maintenance bay

bomb bay

end bay superstructure

fighting bay

interior bay

interior bay bridge superstructure

ramp bay

have (someone) at bay

hangar bay

landing gear bay

overhead luggage bay

undercarriage bay

holding bay

bay

platoon bay

fire bay

firing bay

squad bay

stand at bay

cargo bay

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

aircraft maintenance company (AMCO)

base maintenance

battalion maintenance platoon

communications and control systems maintenance

crew (preventive) maintenance