T-45C TS, ADV & IUT ENG-11
Hydraulic Subsystems
(1) Setting LDG GEAR UP/DN handle to DN
electrically initiates operation of landing
gear hydraulic control valve
(2) Hydraulic pressure is directed to open inner
(main gear) doors (in approximately
1 second)
(3) When inner (main gear) doors fully open,
gear uplocks are hydraulically released,
and hydraulic extension actuator is
activated
(4) When fully extended, gear is hydraulically
and mechanically downlocked by hydraulic
downlock actuator and springs acting on
lock links attached to side brace
(5) After gear is down and locked, inner doors
close and lock hydraulically
NOTE: The trunnion, trailing arm, and fixed
strut doors remain open because they are
mechanically attached to the gear.
b.
Sequence of nose gear/door extension
Sg 1, fr 13
Video: Landing Gear
Extend Sequence
(1) Placing LDG GEAR UP/DN handle to DN
electrically initiates operation of landing
gear hydraulic control valve
(2) Hydraulic pressure is directed to open
forward doors (in approximately 1 second)
(3) When gear doors fully open, gear uplocks
are hydraulically released, and hydraulic
extension actuator is activated
(4) When fully extended, gear is mechanically
downlocked by ring on drag brace
(5) After gear is down and locked, forward
nose gear doors close and lock
hydraulically
(9-98) Original
Page 11-15
Previous Page
