Helicopter Power Plants Mechanic, T-700

You are the new powerplants tech. Nobody lets you touch a T700 unsupervised yet — your job for the next twelve months is to earn the trust that lets you do the work without a CDI watching your hands.

You arrive at HMT-302 at Miramar or HMT-204 at New River after NATTC Pensacola and you are the junior set of hands in an engine shop that keeps CH-53Es, AH-1Zs, and UH-1Ys airborne on whatever the workload is that day. Your world is the step-by-step maintenance procedure card — oil servicing, chip detector pulls, compressor washes, pre/post-flight engine inspections, and the parts-cleaning and record-keeping that never stops. Every step is witnessed by a CDI until you prove you can run it clean. You carry the technical manual, you find the discrepancy, you write the yellow sheet entry, and you hand it to the CDI before you touch the next step. In garrison the shop runs on the COMNAVAIRFORINST 4790.2 (NAMP) maintenance cycle — scheduled maintenance, turnaround inspections, engine trend monitoring data pulls — and you are the body that makes the wrench turn on every one of them.

• 01Execute a T700-GE-401/401C oil servicing from start to sign-off — correct grade, quantity, caps torqued, chip detector inspected and re-installed, yellow sheet completed without a correctable entry.
• 02Perform a chip detector pull and analysis: remove, inspect under magnification, clean, reinstall, and distinguish between fuzz that is normal wear and a chip that grounds the aircraft.
• 03Run a compressor wash on the T700 per the applicable NAVAIR engine maintenance manual — solvent wash followed by rinse cycle, drain confirmation, and the paper trail that shows the engine is back in service.
• 04Read and annotate a NAVAIR maintenance manual step-by-step — annotate completion of each step with initials in the margin as required by the current NAMP work procedure.
• 05Complete a pre/post-flight engine inspection to the applicable aircraft MIM (Maintenance Instruction Manual) standard — cowling removed and reinstalled, fasteners torqued, no FOD left in the nacelle.
• 06Pull and log engine trend monitoring data (gas generator speed, exhaust gas temperature, torque, fuel flow) and identify a reading that is outside the established trend band before a CDI has to catch it.

• —COMNAVAIRFORINST 4790.2 — Naval Aviation Maintenance Program (NAMP): the procedural bible for every maintenance action, QA requirement, and yellow sheet entry in the shop.
• —NAVAIR 01-60JKD-2-2 — Organizational Intermediate Maintenance Manual for the T700-GE-401/401C: the specific engine manual your procedures are written against; know which chapter covers the task before you pick up the wrench.
• —NAVAIR T64-GE-416 engine maintenance manual series — if you are on the CH-53E line, this is the document the CDI quotes when the 53's three engines need procedure cards.
• —NAVMC 3500.15 — Aviation Ground Support T&R Manual: the training and readiness tasks you are evaluated against at the individual level.
• —MCI distance-learning courses relevant to your rating — complete the assigned MCI titles before the section chief has to ask where they stand.

• —Every maintenance action signed off by a CDI before the aircraft moves — no unsupervised work until the CDI qualification is in your jacket and the production control chief says so.
• —1st-Class PFT and CFT under MCO 6100.13 — the ramp is loud, the nacelles are tight, and the work is physical; anything below 1st-Class and your section chief is having a different conversation about you.
• —LCpl on the first look; composite score fed by clean proficiency and conduct marks, no page-11 entries, and a section chief who can write a FitRep that says you are ready.
• —Zero FOD incidents attributable to your work. One piece of foreign object debris in a turbine engine is a class A mishap investigation — and the junior tech on the yellow sheet is the first name the safety officer calls.
• —No yellow sheet discrepancies returned for correction by the CDI more than once on the same task. The second time it comes back, the section chief is watching.

• —Skipping a procedural step and initialing it complete anyway. The CDI who countersigns behind you is signing for work he cannot see — and when the engine throws a fault code at 5,000 feet, the yellow sheet is the first thing NCIS reads.
• —Leaving FOD awareness at the hangar door. A torque adapter, a safety wire pigtail, or a rag left in the nacelle can eat a $5M engine and kill a crew. Count your tools in and count them out. Every time.
• —Over-torquing a B-nut or cross-threading a fitting because you did not feel the resistance and went to the torque wrench anyway. The fuel or oil leak on the flight line is your name on the discrepancy log.
• —Logging chip detector results without actually inspecting under magnification. Fuzz looks like nothing; a metallic chip is a grounding event. Your eyes are the first line of detection — do not summarize the inspection, do the inspection.
• —Treating compressor wash intervals as flexible. The NAVAIR maintenance manual publishes the schedule for a reason — carbon buildup and salt ingestion damage compressor blades; the engine trend data will find the shortcut you took.

The good junior powerplants tech is the Marine the CDI sends to the hot nacelle at 2200 because the yellow sheet will come back with every step initialed in sequence, the chip detectors clean, the FOD count right, and no correctable entries. By the twelve-month mark the section chief is talking about the CDI qualification package; by month eighteen the LCpl is the tech the production control chief pulls for the urgent engine R&R because he has not yet given anyone a reason not to trust him.

The Cpl chevron in an engine shop means one thing: the CDI trusts your work. You are the journeyman who makes the scheduled maintenance cycle run, and two junior techs are watching how you carry the technical standards when nobody is grading you.

You run scheduled maintenance tasks on the T700 family — periodic phase inspections, engine removals and installs (R&R), borescope inspections, fuel control troubleshooting, and the trend monitoring data review that tells production control whether the engine is healthy or headed for early removal. You have your CDI qualification or you are completing the final task signoffs for it, and the section chief is starting to use your signature to cover junior techs on their own procedures. You write yellow sheets that do not come back, you brief a two-person procedure correctly before the first tool comes out of the box, and you are the Cpl the production control chief calls when the flight schedule has a bird that needs an unscheduled inspection turned before the 0600 brief. You are also working toward the Corporal composite score and the Corporals Course slot, which means the admin load is real alongside the maintenance load.

• 01Execute a T700 engine removal and installation (R&R) as the primary tech — break connections, disconnect FADEC harness, sling the engine correctly, install the replacement, reconnect and leak-check per the MIM, and run a ground turn before QA signs the yellow sheet.
• 02Perform a borescope inspection on T700 compressor and turbine sections — insert the scope correctly, inspect every stage per the applicable NAVAIR borescope procedure card, document findings against the applicable serviceable limits, and make the go/no-go call before the CDI walks.
• 03Read engine trend monitoring output — gas generator speed, EGT, torque, and fuel flow trends over the engine's flight history — and identify an emerging anomaly that warrants an unscheduled inspection before a hard fault appears.
• 04Troubleshoot a T700 fuel control or starting system discrepancy using the fault isolation manual in the NAVAIR engine MIM — step through the fault tree, isolate the LRU, pull the part, and write a discrepancy that the supply tech can fill without calling you twice.
• 05Brief and supervise a junior tech (Pvt–LCpl) through a two-person maintenance procedure — correct task sequence, tool accountability, FOD awareness, and yellow sheet documentation — and countersign as a CDI when qualified.
• 06Maintain a personal training record and MOS qualification log that the section chief can pull for audit without finding gaps.

• —COMNAVAIRFORINST 4790.2 — NAMP: Chapter 10 covers CDI qualification requirements and the responsibilities you carry when your signature is on the yellow sheet.
• —NAVAIR 01-60JKD-2-2 and the applicable aircraft MIM (NAVAIR 01-60JKF-2-2 for the AH-1Z; NAVAIR 01-60JKG-2-2 for the UH-1Y): the engine and airframe maintenance manuals you troubleshoot against.
• —NAVMC 3500.15 — Aviation Ground Support T&R Manual: Cpl-level individual and collective task standards you are evaluated against for the MCCRE and the annual T&R review.
• —MCO 1610.7 — Performance Evaluation System: you receive a FitRep annually and you are about to start writing proficiency and conduct marks on junior Marines.
• —MCO 1400.32 — Marine Corps Promotion Manual: composite scores, TFRS cutting scores for 6123 to Sgt — pull the current MARADMIN before you ask the section chief where you stand.
• —Corporals Course curriculum (resident or MCI-equivalent) — complete it before the board, not after the board asks where it is.

• —CDI qualification complete and on file — no countersigning until the NAMP Chapter 10 task signoffs and the QA officer endorsement are in the record.
• —Corporals Course graduate or MCI equivalent complete; cutting score tracked monthly in TFRS; no Sgt board eligibility without it.
• —1st-Class PFT and CFT under MCO 6100.13.
• —Zero yellow sheet discrepancies returned by QA for procedural non-compliance during the current annual period — one returned discrepancy is a counseling entry; two is a CDI re-qualification conversation.
• —Engine trend data reviewed and logged on every applicable asset in the shop on the section chief's timeline, not yours.

• —Signing off a borescope inspection with images that do not cover all required stages. QA pulls the borescope records on a mishap investigation and the missing images are procedural non-compliance — your CDI stamp is on the work order.
• —Installing an engine without a final connection torque check because "it felt right." B-nuts and electrical connectors on a T700 get a torque wrench and a witness — the engine test cell does not forgive what the ramp will find at altitude.
• —Using an out-of-date revision of the NAVAIR maintenance manual because you did not check the current change number before starting the task. NAVAIRs get revised; the change that updated the torque value you are about to use may have been issued last month.
• —Failing to document a discrepancy because you fixed it before the CDI walked. Undocumented maintenance is unverified maintenance — the next tech on that engine does not know what you saw and what you did.
• —Treating engine trend data entry as a data-entry task instead of an analysis task. The trend is telling you something; the junior tech who just copies numbers is the one the section chief has to re-brief after the first engine autotermination.

The good Cpl powerplants tech is the journeyman the section chief drops on an unscheduled T700 R&R at 1600 on Friday and trusts to turn the bird for the 0700 brief on Saturday without a phone call. His yellow sheets come back clean, his junior techs write clean discrepancies because he trained them, and the Corporals Course slot was not chased — it was waiting for him.

The section runs through you now. The section chief is managing the production schedule and the FitReps; you are the Sgt who makes sure the engine shop hits the flight schedule and the junior techs go home having learned something.

You lead a shift or a maintenance section — four to eight techs ranging from Pvts to Cpls — through the daily production schedule: phase inspections, unscheduled maintenance, engine trend reviews, QA corrective actions, and the never-ending documentation load that follows every task. You write proficiency and conduct marks on your junior Marines, you brief the section on any NAVAIR technical directive changes that affect the workload, and you are the Sgt the production control chief calls when a scheduled engine removal hits a snag and the flight schedule is waiting. You are building your FitRep, your composite score for SSgt, and your Sergeants Course packet simultaneously with running the section, and the section chief is watching whether you can do all three without dropping one of them. The QA shop also knows your name now because your CDI signature is on the yellow sheets and QA audits your work on the semi-annual records review.

• 01Plan and execute a maintenance section's daily production schedule — prioritize by aircraft availability, assign tasks to the correct qualification level, and brief the section before the first tool comes out of the box.
• 02Write clean Section A proficiency and conduct marks on three to five Marines — observed behavior, action-result-impact, no inflation the section chief cannot defend at the annual FitRep review.
• 03Conduct a pre-task brief for a high-risk maintenance action (engine R&R, borescope, accessory component replacement) that covers the procedure card, tool accountability, FOD prevention plan, two-person integrity points, and the hazard brief from the NAVAIR maintenance manual.
• 04Review engine trend monitoring data for a multi-aircraft section and identify the one asset that needs production control notification before it appears on the QA discrepancy log.
• 05Navigate a NAVAIR technical directive and brief the section on what changes, which assets are affected, what the compliance deadline is, and who signs the compliance record.
• 06Mentor a Cpl toward CDI qualification — identify the remaining NAMP Chapter 10 task signoffs, schedule the witnessed tasks with QA, and route the endorsement package without a rejection.

• —COMNAVAIRFORINST 4790.2 — NAMP: Chapter 6 (maintenance documentation), Chapter 10 (CDI/QA qualification), and Chapter 7 (technical directives and TCNs) are the chapters you run the section against.
• —NAVAIR 01-60JKD-2-2 / applicable aircraft MIMs — you are the senior reference in the section for procedure questions; if you do not know the answer, you open the manual and find it before the junior tech improvises.
• —NAVMC 3500.15 — Aviation Ground Support T&R Manual: Sgt-level collective tasks and the training plan you build the section's T&R program against.
• —MCO 1610.7 — Performance Evaluation System: you write FitReps now and you will be evaluated on the quality of the reports you produce for your Marines.
• —MCO 1400.32 — Marine Corps Promotion Manual: Sergeants Course, composite score, SSgt cutting score — pull the current MARADMIN.
• —HUMS (Health and Usage Monitoring System) data review procedures for CH-53K — if your section supports King Stallion assets, the digital HUMS outputs feed the engine trend program and QA audits the review log.

• —Sergeants Course graduate — gated requirement, no path to SSgt without it.
• —Section T&R task completion rate at or above the MAG standard for the current semi-annual period — the production control chief reports up against every section in the squadron.
• —Zero QA-attributed discrepancies on your CDI work during the annual records review — one non-compliance finding is a re-qualification conversation; a pattern is a relief.
• —1st-Class PFT and CFT; your section averages watched by the section chief and the maintenance officer.
• —FitRep relative value at or above the squadron average for Sgts — the SSgt board is FitRep-driven and one weak cycle moves the timeline.

• —Approving a work assignment to a junior tech who is not qualified for that task. The NAMP is explicit about qualification levels — your CDI stamp on a task performed by an unqualified tech is a NAMP violation and a safety investigation.
• —Briefing a high-risk task verbally without a written pre-task brief. When the investigation board convenes, "we talked about it" does not equal "the brief was completed per the NAMP."
• —Allowing a technical directive compliance deadline to slip because the parts are in supply. Late compliance is a fleet-wide grounding flag — notify production control the day you identify the at-risk deadline, not the day after it passes.
• —Skipping the post-maintenance engine trend data review because the bird tested clean. The trend anomaly that matters is the one you see across four flights, not the one that shows up on a single post-maintenance run.
• —Holding a counseling conversation with a junior tech verbally and not putting it on a page-11. If it mattered enough to say, it matters enough to document.

The good Sgt section lead is the Marine the section chief gives the hardest unscheduled maintenance event to because the yellow sheets will come back signed correctly, the junior techs will know what they did and why, and the aircraft will be turned in time for the flight schedule. His Cpls are CDI-qualified, his FitRep inputs are on the section chief's desk before the suspense, and the Sergeants Course packet was submitted — not reminded.

You are the Work Center NCOIC. The maintenance officer and the QA chief both know your name — one for the flight schedule you are keeping, the other for the discrepancy trends your section is generating. Your job is to make sure those two conversations stay favorable.

You run the Power Plants Work Center — engine maintenance, engine trend monitoring, engine R&R coordination, CDI program administration for your section, and the supply chain for the consumables and LRUs the work center burns through. You manage ten to fifteen techs across the full rank spectrum, you write four to six FitReps per cycle, and you own the interface with production control: aircraft availability, maintenance man-hours, unscheduled event impact on the flight schedule, and the NAMP corrective action plan when QA finds a discrepancy in your section's records. You are also attending Career Course, studying the GySgt composite score, and mentoring two or three Sgts toward the Sergeants Course and the SSgt board simultaneously. The maintenance officer is reading your work center status brief every week. The MAG inspector general audits your records twice a year. Both conversations are yours to manage.

• 01Brief the maintenance officer and production control on work center status — aircraft availability, open discrepancies, man-hour projections, parts constraints — in ten minutes or less with accurate data.
• 02Administer the CDI program for the work center: track qualification currency, schedule witnessed tasks for candidates, route endorsement packages to QA, and maintain the qualification records QA will pull on the next audit.
• 03Write four to six FitReps per cycle that the reporting senior can defend at the battalion FitRep review — clean Section A, action-result-impact, defensible relative value.
• 04Conduct a pre-planned maintenance inspection (periodic phase or special inspection) end-to-end as the work center NCOIC — task assignment, pre-task briefs, in-process quality checks, final inspection sign-off, and the production control closeout.
• 05Identify and correct a NAMP documentation deficiency in the work center before the semi-annual QA records review — pull the yellow sheets yourself, find the gap, correct it, and brief the section on what changed.
• 06Manage the work center's consumables and LRU requisition pipeline — know what is on order, what is back-ordered, and what the supply constraint does to the flight schedule before production control has to ask.

• —COMNAVAIRFORINST 4790.2 — NAMP: you enforce this document at the work center level. Chapter 10 (CDI/QA), Chapter 6 (documentation), Chapter 7 (TDs/TCNs), and the applicable MOS-specific maintenance chapters are the audit standard QA uses.
• —NAVAIR 01-60JKD-2-2 and applicable aircraft MIMs — you resolve the hard procedure questions in the section and you are the escalation point before the call goes to QA or the maintenance officer.
• —NAVMC 3500.15 — Aviation Ground Support T&R Manual: SSgt-level collective tasks and the work center T&R program you build the training schedule against.
• —MCO 1610.7 — Performance Evaluation System: four to six FitReps per cycle; the quality of these reports feeds the next generation of SNCOs.
• —MCO 1400.32 — Marine Corps Promotion Manual: Career Course completion, GySgt composite score, FitRep relative value — pull the current MARADMIN before the career conversation with your Sgts.
• —CH-53K HUMS data review procedures and applicable technical bulletins — if the work center supports King Stallion assets, the digital HUMS program is a QA audit item and the work center NCOIC owns the review record.

• —Career Course (resident or distance) complete; SNCO Academy slot slated before the GySgt board cycle.
• —Work center CDI qualification rate at or above the MAG standard — QA audits the qualification records and the NCOIC is accountable for every expired or incomplete qualification in the section.
• —Work center QA corrective action close-out rate at 100% within the prescribed NAMP timeline — open corrective actions at the semi-annual audit are a direct reflection of the NCOIC.
• —FitRep relative value at or above the squadron average for SSgts; the GySgt board is FitRep-driven and two weak cycles is a decade lost.
• —1st-Class PFT and CFT; the work center watches the NCOIC's scores on the quarterly health-of-the-force slide.

• —Allowing a CDI qualification to lapse without notifying QA and pulling the tech from countersigning work. An expired CDI signing yellow sheets is a NAMP violation — and it surfaces on the next audit as the NCOIC's corrective action, not the tech's.
• —Correcting a documentation deficiency without writing the corrective action entry. QA finds the white-out and the black pen and the story you did not want to tell writes itself.
• —Signing a work center status brief with numbers you have not verified from the production control system. The maintenance officer will brief the CO with your numbers — if they are wrong, both conversations end badly.
• —Letting a recurring engine trend anomaly sit in the data without an informal NAMP notification to production control. Trend analysis is not optional; it is the early warning system for an engine that would otherwise fail in the aircraft.
• —Writing a FitRep as a checklist instead of an evaluation. The GySgt board compares every SSgt in the MAG; the NCOIC who cannot defend the relative value of his own Marines loses the best ones to sections where the NCOIC can.

The good SSgt Work Center NCOIC is the Marine the maintenance officer calls when a bird has to turn overnight and the QA chief calls when the semi-annual audit is three days out. His CDI records are current, his corrective actions are closed, his FitReps were on the section chief's desk before the suspense, and the Sgts running his sections are within six months of the SSgt board.

You are the senior powerplants SNCO in the squadron. Production control routes the hard engine questions to you, QA routes the non-compliance questions to you, and the maintenance officer reads what you put on his desk as fact until you give him a reason not to.

You run the Power Plants Division as the senior SNCO — multiple work centers, twenty to thirty Marines, the full engine maintenance program for the squadron's aircraft fleet, and the interface with the MAG Engine Program Manager when an engine is trending toward early removal or when a fleet-wide airworthiness directive lands. You write five to eight FitReps per cycle, you chair the work center's CDI qualification board, and you own the engine health management program: trend data review, early removal justifications, supply requisition for long-lead engine parts, and the NAMP corrective action plan when QA findings require a program-level response. You advise the maintenance officer and the CO on every enlisted decision in the Power Plants Division and you set the technical standard the entire division operates against. You are also competing for the MSgt / 1stSgt board, which means the Career Course is done, the SNCO Academy slot is slated, and the FitRep profile is either on track or it is not.

• 01Brief the maintenance officer and the CO on Power Plants Division status — aircraft availability, engine health trends, early removal candidates, man-hour projections, NAMP compliance posture — and defend the numbers.
• 02Chair the division CDI qualification program — review candidate task completion, conduct or observe the qualifying boards, sign the endorsement packages, and maintain the currency records QA audits.
• 03Manage an engine early removal (EER) justification from the trend data flag to the supply requisition to the replacement engine install — documentation, production control coordination, and the QA close-out.
• 04Write a NAMP program-level corrective action plan in response to a MAG inspection finding — root cause, corrective action, verification method, and timeline — that the maintenance officer can brief without revision.
• 05Mentor two to three SSgts toward the GySgt board and Career Course completion simultaneously, with honest reads on whose FitRep profile can carry the board and whose needs a different conversation.
• 06Interface with the MAG Engine Program Manager and the NAVAIR Fleet Support Team when a fleet-wide engine issue requires squadron-level compliance action or data collection.

• —COMNAVAIRFORINST 4790.2 — NAMP: you enforce this at the division level and you are the first-level escalation when a work center NCOIC cannot resolve a NAMP compliance question.
• —NAVAIR 01-60JKD-2-2 / applicable aircraft MIM series — you are the technical authority in the squadron for T700 engine questions; if it escalates to you, you own the answer or you make the right phone call to NAVAIR Fleet Support.
• —NAVMC 3500.15 — Aviation Ground Support T&R Manual: GySgt-level collective tasks and the division T&R program you build the training schedule against.
• —MCO 1610.7 — Performance Evaluation System: five to eight FitReps per cycle; the quality of your reports feeds the next GySgt and MSgt cohort.
• —MCO 1400.32 — Marine Corps Promotion Manual: MSgt / 1stSgt board mechanics, FitRep relative value, and the 6123-to-senior-SNCO roadmap — pull the current MARADMIN.
• —Applicable NAVAIR Airworthiness Directives and Technical Bulletins for the T700 and T64 engine families — the GySgt who learns about a fleet-wide engine restriction from the maintenance officer instead of from the NAVAIR notice has a process problem to fix.

• —SNCO Academy Advanced Course (Career Course) complete; SNCO Academy Senior Course slated when MSgt / 1stSgt board approaches.
• —Division CDI qualification rate at 100% for all current billets; no expired qualifications on the day of the MAG inspection.
• —Division NAMP corrective action close-out rate at 100% within the prescribed timeline — open findings at the MAG semi-annual audit are a GySgt-level accountability item.
• —1st-Class PFT and CFT; the division watches the senior SNCO's scores on the quarterly health-of-the-force slide.
• —FitRep profile that the senior reporting official can defend at the MSgt / 1stSgt board — relative value, attribute rationale, and the SSgt bench your reports produced.

• —Delegating the engine trend data review entirely to the work center NCOICs without a GySgt-level sanity check. The trend anomaly that grounds a fleet is the one every layer passed until the engine removed itself from service.
• —Allowing the CDI qualification board to become a rubber stamp. The SNCO who signs CDI qualification packages for Marines who have not earned them is the SNCO whose section generates the next mishap investigation.
• —Carrying a personal position on a technical debate with QA or the MAG Engine Program Manager into the open. Take the technical disagreement through the maintenance officer; walk out aligned; the CO hears it from one voice.
• —Letting a FitRep suspense slip because the section is busy. The SSgt whose FitRep is late is the SSgt whose board case is the last packet reviewed — and the late-reporting senior is the GySgt the reporting official remembers.
• —Going around the maintenance officer to the CO or the MAG on an engine issue without looping in the maintenance officer first. The maintenance officer finds out — usually from the CO, in the worst possible context.

The good GySgt Power Plants SNCOIC is the Marine the maintenance officer walks to first when a hard engine question hits the desk and the QA chief calls when the MAG inspection pre-brief identifies a potential program finding. His CDI records are clean, his early removal justifications are defensible, his SSgts are Career Course graduates and GySgt-board candidates, and the BSgtMaj is already mentioning his name to the MAG SgtMaj before the MSgt slate goes up.

You are the senior enlisted maintenance authority for the aviation squadron or the occupational field. Marine aviation keeps its aircraft flying on the standards you set and the techs you produced. The decision of whether your final years go toward 1stSgt / SgtMaj (formation leadership) or MSgt / MGySgt (MOS SME — maintenance chief, AMOS, schoolhouse) is the career decision that defines the last decade.

As MSgt and Aviation Maintenance Officer Advisor (AMOS equivalent billet) or senior maintenance chief you advise the squadron CO, the maintenance officer, and the MAG maintenance chief on every enlisted decision in the aviation maintenance community. You set the technical standard for the 6123 occfield across the squadron or the MAG, you write the FitRep endorsements that decide who becomes the next GySgt and SNCO in Power Plants, and you own the engine health program at the highest enlisted level — interfacing with NAVAIR Fleet Support, the Type Wing, and HQMC aviation policy when fleet-wide engine issues require a policy response. As SgtMaj you advise the CO and the MAG CO on enlisted decisions across the entire maintenance department. As MGySgt you are the occupational authority the MMPB and HQMC aviation call when the 6123 MOS roadmap needs rewriting or when the T700 platform's maintenance posture requires a formal senior-enlisted assessment. You write fewer FitReps but every one you write shapes the next generation of SNCOs who will outlast you in the fleet.

• 01Advise the CO and the maintenance officer on Power Plants Division and MAG-level engine health management — fleet availability trends, early removal rates, supply chain constraints, NAVAIR program manager interface — in terms the CO can defend to the MAG CO without a translation layer.
• 02Write MSgt and GySgt FitRep endorsements that the board can defend at HQMC — measurable unit impact, honest attribute rationale, and relative value that the MMPB reads as the senior endorser's professional reputation.
• 03Interface with NAVAIR Fleet Support, the Type Wing, and the applicable ISSC (Intermediate-level Supply Support Center) on an engine fleet issue that requires a policy response — failure data, corrective action plan, and the maintenance community's voice in the technical solution.
• 04Mentor the next GySgt / MSgt cohort on the 1stSgt-versus-MSgt path decision with honest reads — who carries the formation, who carries the MOS, and who the MMPB will place in the schoolhouse billet that shapes the next decade of 6123 techs.
• 05Brief the MAG CO and the MAG SgtMaj on enlisted Power Plants readiness — qualification rates, CDI coverage, training currency, retention of mid-grade NCOs — at the level of detail the CO needs to make a resource decision.
• 06Run a casualty notification or memorial service with the dignity it requires — at this rank, you are the face the formation and the family remember.

• —COMNAVAIRFORINST 4790.2 — NAMP: at this rank you shape the policy, not just enforce it — NAMP revision comments from HQMC come through senior enlisted channels for a reason.
• —NAVAIR Fleet Support Team and Type Wing technical bulletins for the T700-GE-401/401C and T408-GE-400 (CH-53K) — the AMOS-level SNCO is the first enlisted voice in the room when NAVAIR proposes a maintenance policy change that affects the fleet.
• —MCO 1610.7 — Performance Evaluation System: you write the FitRep endorsements that decide the next SNCO slate; the quality of those endorsements is your professional legacy in the MOS.
• —MCO 1400.32 — Marine Corps Promotion Manual: 1stSgt / SgtMaj / MSgt / MGySgt board mechanics, the MMPB placement process for senior billets, and the MOS roadmap conversation with your bench.
• —MCO 1900.16 — Marine Corps Separation and Retirement Manual: you are the resource the squadron comes to for transition questions — second career runway, VA disability claim timing, SkillBridge — and you plan your own transition 24–36 months out.
• —The Commandant's Reading List and current Marine Corps Planning Guidance — at this rank you are expected to consume strategic doctrine and translate it down to LCpls in the engine shop.

• —SNCO Academy Senior Course (or equivalent PME) complete; the career-path conversation with the MMPB happens before the board cycle, not after.
• —Squadron or MAG CDI qualification rate at 100% on the day of every inspection — the AMOS-level SNCO is accountable for the program posture he inherited and the one he built.
• —Zero senior-NCO-level integrity, OPSEC, or safety incidents. At this rank, one ends the career permanently and publicly — and the Corps does not relitigate.
• —FitRep endorsements producing MSgt and GySgt selectees at rates the MMPB points to in MOS health briefings.
• —Post-service transition plan running 24–36 months out — A&P license coursework identified or complete, VA disability claim filed pre-EAS, SkillBridge slot mapped, federal civil-service or contractor bridge considered.

• —Pretending to be current on a T700 or T408 technical issue you have not personally worked in five years. Senior SNCOs who fake depth lose the maintenance officer's confidence in the room where it matters — brief what you know, own what you do not, and make the right call to NAVAIR Fleet Support.
• —Letting the CDI program posture drift because the GySgts "own it." You set the standard; the program reflects the senior SNCO's attention — and the MAG inspection finds the drift before you do if you stop looking.
• —Writing FitRep endorsements from the same template for every GySgt you rate. The MMPB reads every endorsement the senior SNCO puts his name on; the cookie-cutter endorsement is the endorsement that does not produce a board selectee.
• —Treating the post-service transition as something to plan at the twenty-year mark. The A&P license, the civilian maintenance certifications, and the federal-service conversion are multi-year tracks — the MSgt who starts at year nineteen retires into a gap.
• —Going public with a disagreement over a CO or maintenance officer decision on an engine safety matter. Take it in the office. Walk out aligned or escalate through the proper chain. The maintenance community watches how the senior SNCO handles the hard conversations.

The good MSgt / MGySgt Power Plants SNCO is the Marine the MAG maintenance chief calls when an engine program issue needs an honest senior-enlisted assessment and the Marine the CO walks to when an engine safety question needs an answer the formation will trust. His GySgts are on the MSgt board. His CDI program is clean. The T700 assets the squadron fields are in the configuration the NAVAIR Fleet Support Team expects. And the civilian credential runway is already mapped — the A&P license coursework is underway, the VA claim is filed, and the formation will remember how he carried the standard until the last day he stood in it.