helicopter logged hours

flying hours / logged flight hours

logged flight hours / flying hours

engine logged hours

air combat capable helicopter / air-to-air capable helicopter

ambulance helicopter / medical evacuation (MEDEVAC) helicopter

medical evacuation (MEDEVAC) helicopter / ambulance helicopter

hours flown in combat

cryptanalyst hours

maintenance by flight hours

airframe flying hours

assigned life (of an aircraft in flying hours)

mean time between repairs (flying hours)

time to first overhaul (flying hours)

total airframe flying hours

sack duty (hours, time)

in the hours of daylight

Watt hours (Wh) rating

man hours of duty

assault helicopter company / troop

assault support helicopter battalion

attack helicopter (atk hel)

attack helicopter troop

cargo helicopter

heavy-lift helicopter

helicopter / (розм.) heli / helo / chopper (H; hel)

helicopter amphibious assault ship

helicopter carrier

helicopter hoist

helicopter landing deck

helicopter operations

helicopter transportable

landing platform (helicopter)