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Marine Corps MOS · Aviation

6124 Helicopter Power Plants Mechanic, T-400/T-700

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Helicopter Power Plants Mechanic for T-400 and T-700 systems inspects, maintains, and tests helicopter power plants. The mechanic repairs and performs complete repairs on power plants and their systems.

Minimum ASVAB: CL 105 or MM 105

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: navmc-1200-1l-fy26 (source date 2025-03). Policy applicability has not been established.

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Core Skills

  • Helicopter power plant inspection and testing
  • Complete helicopter power plant system repair

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Aircraft Mechanics and Service Technicians

Inspecting, maintaining, testing, and repairing T-400/T-700 helicopter power plants directly supports civilian aircraft engine maintenance work.

How to prepare: Assemble documentary evidence of your military engine-maintenance experience for FAA review toward the Powerplant rating. The experience route requires 18 months of appropriate practical experience, age 18 or older, English proficiency, and knowledge, oral, and practical tests; FAA-approved school or qualifying military certification-course completion offers an alternative to the experience route.

What the civilian work involves
  • Read and interpret maintenance manuals, service bulletins, and other specifications to determine the feasibility and method of repairing or replacing malfunctioning or damaged components.
  • Maintain repair logs, documenting all preventive and corrective aircraft maintenance.
  • Conduct routine and special inspections as required by regulations.

Notes & Sources

  • Air carriers often require FAA mechanic certification for hiring, although it is not an FAA regulatory requirement for every airline mechanic job.
Evidence for this guidance (3 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 6124

    [1] MOS 6124 section "a. Summary"; cached text line 49762; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Helicopter power plant inspection and testing, Complete helicopter power plant system repair, Aircraft Mechanics and Service Technicians (O*NET 49-3011.00)

    [2]NAVMC 1200.1L MOS 6124: Related SOC titles · MOS 6124 section "e. Related Standard Occupational Classification"

    Supports: Aircraft Mechanics and Service Technicians (O*NET 49-3011.00)

  2. O*NET: Aircraft Mechanics and Service Technicians

    [3] O*NET 30.3 occupational data

    Supports: Aircraft Mechanics and Service Technicians (O*NET 49-3011.00)

  3. FAA: Become an Aviation Mechanic

    [4] Requirements and mechanic experience requirements

    Supports: Aircraft Mechanics and Service Technicians (O*NET 49-3011.00)

Defense contractor jobs for 6124

Predecessor codes

Historical codes with documented links to 6124. Each history page explains the change.

6135Title not stated in source

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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