Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
NOTE: Strut doors and the drag brace
fairing remain open because they are
mechanically linked to the gear.
NOTE: The total time for MLG/NLG
extension is about 15 seconds.
c.
Sequence of main gear/door retraction
Sg 1, fr 15
Video: Landing Gear
Retract Sequence
NOTE: If the LDG GEAR handle is set to UP
with weight on wheels, the gear will not retract.
(1) Placing LDG GEAR UP/DN handle to UP
electrically initiates operation of landing
gear hydraulic control valve
(2) Hydraulic pressure is directed to open inner
(wheel) doors (in approximately 1 second)
(3) When gear doors fully open, downlocks
are hydraulically released and hydraulic
retraction actuator returns gear to up
position
NOTE: Trunnion, trailing arm, and fixed
strut doors will close as gear retracts
because they are mechanically attached
to the gear.
(4) When fully retracted, hydraulically operated
uplocks will lock gear
(5) After gear is up and locked, inner (wheel)
doors hydraulically close and lock
d.
Sequence of nose gear/door retraction
(1) Placing LDG GEAR UP/DN handle to UP
electrically initiates operation of a landing
gear hydraulic control valve
(2) Hydraulic pressure is directed to open nose
gear doors (in approximately 1 second)
(9-98) Original
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