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Marine Corps MOS · Aviation

6174 Helicopter Crew Chief, UH-1

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

UH-1 Helicopter Crew Chiefs serve as flight crew members and answer to the pilot in command while operating the aircraft and its mission and weapons systems. When not on the flight schedule, they inspect, service, maintain, and repair power plants, transmissions, drivetrains, fuel systems, flight controls, and rotor systems.

Minimum clearance: Secret

Minimum ASVAB: EL 105 or GT 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 powerplant and fuel system maintenance
  • Transmission, drivetrain, and rotor system repair
  • Flight control system inspection and maintenance

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

UH-1 inspection, servicing, maintenance, and repair of powerplants, transmissions, drivetrains, fuel systems, flight controls, and rotors directly support aircraft maintenance work.

How to prepare: Gather documentary evidence of your military maintenance duties for FAA evaluation toward Airframe and Powerplant ratings. Certification requires age 18 or older, English proficiency, qualifying experience of 18 months for one rating or 30 months concurrently for both ratings (or an accepted training route), and knowledge, oral, and practical tests.

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

  • An FAA Aviation Mechanic certificate is not a regulatory requirement for every airline mechanic job, although air carriers often require it for hiring.
Evidence for this guidance (3 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 6174

    [1] MOS 6174 section "a. Summary"; cached text line 50218; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Helicopter powerplant and fuel system maintenance, Transmission, drivetrain, and rotor system repair, Flight control system inspection and maintenance, Aircraft Mechanics and Service Technicians (O*NET 49-3011.00)

  2. O*NET: Aircraft Mechanics and Service Technicians

    [2] O*NET 30.3 occupational data

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

  3. FAA: Become an Aviation Mechanic

    [3] Requirements and mechanic experience requirements

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

Defense contractor jobs for 6174

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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