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Marine Corps MOS · Aviation

6123 Helicopter Power Plants Mechanic, T-64

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

T-64 Helicopter Power Plants Mechanics inspect, maintain, test, and repair helicopter power plants. They also perform complete repairs of power plants and their associated systems.

Minimum ASVAB: 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

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

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, testing, maintaining, and completely repairing T-64 helicopter power plants directly overlaps with civilian aircraft engine maintenance.

How to prepare: Assemble military maintenance experience records for FAA review toward the Powerplant rating. That rating requires 18 months of appropriate practical experience or an accepted training route, age 18 or older, English proficiency, and knowledge, oral, and practical tests; pursuing both Airframe and Powerplant ratings through experience requires 30 months of concurrent duties appropriate to both.

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

Evidence for this guidance (3 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 6123

    [1] MOS 6123 section "a. Summary"; cached text line 49731; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

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

    [2]NAVMC 1200.1L MOS 6123: Related SOC titles · MOS 6123 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 6123

Predecessor codes

Historical codes with documented links to 6123. 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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