T-45A UJPT, E2-C2, ADV & IUT Eng-13
Hydraulic Subsystems
(2) Hydraulic pressure is directed to
open inner (main wheel) doors (in
approximately 1 second)
(3) When gear doors fully open, gear
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
(main 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)
(3) When gear doors fully open, gear
downlocks are hydraulically
released and hydraulic retraction
actuator returns gear to up
position, mechanically closing drag
brace fairing and strut doors as
gear raises
(4) When fully retracted, gear is
mechanically uplocked and held
up by hydraulic pressure
(8-03) Original
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