T-45C TS, ADV & IUT ENG-11
Hydraulic Subsystems
(3) When gear doors fully open, 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
(5) After gear is up and locked, nose gear
doors close and lock
NOTE: The total time for MLG/NLG
retraction is about 10 seconds.
Sg 1, fr 16
e. Emergency extension system
Landing Gear Controls
and Indicators
(1) Mechanically controlled and gravity
operated
(2) Used whenever a HYD 1 or total electrical
failure occurs
(3) Operates both NLG and MLG
(4) Initiated by rotating the EMER GEAR
handle clockwise and then pulling, which:
(a) Mechanically releases gear uplocks
and door locks
(b) Neutralizes fluid pressure in retract
and extend hydraulic lines
(c) Allows landing gear to extend by
gravity free-fall
(5) Mechanical downlocks engage when fully
extended
(6) MLG inner doors do not close during
emergency gear extension
(9-98) Original
Page 11-17
Previous Page
