експлуатаційний люк
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
commander's hatch
driver's hatch
escape hatch
hatch
roof hatch
bustle hatch
crew hatch
ditching hatch
hatch crew
armored hatch
driver's hatch hood
engine hatch
access hatch
emergency exit hatch
rescue hatch
rescue hatch window
afterhatch / aft hatch
jump out of a hatch
companionway hatch
hatch cover
sliding hatch
aircraft maintenance company (AMCO)
base maintenance
battalion maintenance platoon