aircraft accessory gear box

engine accessory gear box

gearbox / gear box

intermediate gear box

intermediate reduction gear box

main gear box / main rotor transmission

main gear box oil temperature indicator

main rotor transmission / main gear box

rotor (system) gear box

tail rotor gear box

transmission / gear box

accessory section

accessory rail

NATO Accessory Rail (NAR)

accessory kit

accessory

accessory case

accessory drive

accessory drive gearbox

accessory drive assembly breakdown

accessory drive damage

accessory defenses

accessory gearbox

camshaft gear (timing gear)

gear reduction unit / gear-reduction unit

range transmitting gear (of an anti-aircraft sight)

training aircraft (tng acft) / trainer aircraft

aircraft accident (flight accident; aircraft mishap)

aircraft armaments / aircraft weapons

aircraft accident / flight accident, aircraft mishap

aircraft mishap / flight accident, aircraft accident

aircraft modernization / aircraft upgrade

aircraft track and balance (adjusting balance of aircraft)