maintenance operation

contingency maintenance / special maintenance

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

maintenance checks / routine maintenance, scheduled tasks

maintenance idling (periodic running of engine for maintenance purposes)

organizational maintenance (O-level) (day-to-day work that standard airfield maintenance groups perform in support of airfield operations)

routine maintenance / scheduled tasks, maintenance checks

scheduled tasks / routine maintenance, maintenance checks

special maintenance / contingency maintenance

maintenance, repair and operation (MRO)

operation and maintenance, Army (OMA)

Naval Facilities Engineering Command Technical Publication - Maintenance Operation

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

aircraft maintenance company (AMCO)

base maintenance

battalion maintenance platoon

communications and control systems maintenance

crew (preventive) maintenance

depot maintenance

Depot Maintenance Actions Working Group (DMAWG)

development and maintenance of morale

direct maintenance support

establishment and maintenance of protective measures

field maintenance

first echelon maintenance

first echelon medical equipment maintenance

gun maintenance (GM)

heavy maintenance/repair

intermediate maintenance

light maintenance