Back to MARADMINs
MARADMIN 518/26

Out of Cycle Inclusion of New MOS Requirements for Necessary MOS 6053 in the Fiscal Year 2027 MOS Manual

This MARADMIN announces an out-of-cycle update to the FY 2027 MOS Manual for Necessary MOS (NMOS) 6053 CH-53K Maintenance Specialist. The update removes on-the-job training (OJT) as a pathway for awarding the MOS and adds assignment criteria for Marines who complete the final course of a CH-53K initial accession pipeline, supporting the Marine Corps' transition from CH-53E to CH-53K aircraft.

Issued: October 22, 2026
1.  Purpose. This MARADMIN represents an out of cycle
change to reference (A) for Necessary MOS (NMOS) 6053 CH-53K
Maintenance Specialist, announces the removal of on-the-job training
(OJT) as a training pathway for awarding the MOS and adds an 
assignment criteria statement enabling the MOS to be awarded to 
Marines who have completed the final course of a CH-53K initial 
accession pipeline.
2. Background. In accordance with reference (B) the Deputy Commandant
for Aviation (DCA) submitted a proposed out of cycle change to
reference (A).  The submitted change was accepted for inclusion in
the forthcoming FY 2028 MOS Manual; however, immediate implementation 
in FY 2027 is required to support the Marine Corps' transition from 
the CH-53E to the CH-53K and to ensure standardized maintenance 
training. Paragraph 3 contains the revised NMOS 6053 MOS entry for 
reference (A). 3. MOS 6053, CH- 53K Maintenance Specialist (GySgt to 
Pvt) NMOS (6113,6153, 6173, 6323).
3.a.  Summary.  This MOS is to be assigned only as a necessary-MOS
(NMOS) to qualified Marines who have successfully completed the
requisite transition course as a primary means, or any final course
of a CH-53K initial accession pipeline, or other training coordinated
and approved by DCA and DC T&E in support of CH-53K maintenance 
functions at the squadron level.
3.b.  Prerequisites.  Must be qualified in the following Primary MOSs
6113, 6153, 6173, 6323.  Refer to MOS specific training and readiness
manual for qualification/certification/licensing requirements.
3.c.  Requirements
3.c.1.  This MOS is to be assigned only as a necessary-MOS (NMOS) to
qualified Marines who have successfully completed the requisite
transition course.  Specific MOS requirements are as follows:
3.c.1.a.  MOS 6113 and 6173:  Complete the CH-53K Mechanic
(transition) Organizational Maintenance Course (M05P4I1).
3.c.1.b.  MOS 6323:  Complete the CH-53K Avionics Technician
(transition) Organizational Maintenance Course (M05P401).
3.c.1.c.  MOS 6153:  Complete the CH-53K Airframe Mechanic
(transition) Organizational Maintenance Course (M05P491).
3.c.1.d.  Alternatively, complete other training coordinated and 
approved by DCA and DC T&E in support of CH-53K maintenance functions 
at the squadron level.
3.c.2.  This NMOS is also to be assigned to qualified Marines who
have completed the final course of a CH-53K initial accession
pipeline.  Specific courses are as follows:
3.c.2.a.  Complete the MOS 6113 CH-53K Initial Accession Mechanic
Pipeline Course (M05P591).
3.c.2.b.  Complete the MOS 6173 CH-53K Marine Enlisted Aircrew
Training Course (M0553E4).
3.c.2.c.  Complete the MOS 6323 CH-53K Initial Accession Avionics
Pipeline Course (M05P571).
3.c.2.d.  Complete the MOS 6153 CH-53K Initial Accession Airframe
Mechanic Pipeline Course (M05P581).
3.d.  Duties.  For a listing of duties and tasks, refer to
COMNAVFORINST 4790.2 Naval Aviation Maintenance Program, NAVMC 4790.1
Aviation Maintenance and Supply Training and Readiness Program
(AMSTRP), and the Advanced Skills Management (ASM) web-based 
enterprise training management system.
3.e.  Related Standard Occupational Classification (SOC) Title and
Code.  None.
3.f.  Related Military Skill.  None.
4. This message has been coordinated with DCA ASB.
5. This MARADMIN is applicable to the total force. 
6. Direct all questions to the MARADMIN POCs.
7. Release authorized by Lieutenant General T. B. Savage, Commanding 
General, Training and Education Command Deputy Commandant for 
Training and Education.