Hydraulic Subsystems
T-45C TS, ADV & IUT ENG-11
C.
Operation
Fig 8: Landing Gear
Indications
LESSON NOTES
Refer to Figure 8 throughout the discussion on the operation of
the landing gear systems.
POSITION
LIGHT
CONTROL
NOSE,
LANDING
CONTROL
DOOR
DOOR
HANDLE
GEAR
LEFT, RIGHT
HANDLE
Down
Closed
Down and Locked
Green
Off
Off
Up
Closed
Down and Locked
Green
Off
Red
Up
Any Open
Down and Locked
Green
On
Red
Up
Open
Not Down and Locked
Off
On
Red
Up
Open
Up and Locked
Off
On
Red
Up
All Closed
Up and Locked
Off
Off
Off
Down
All Closed
Not Down and Locked
Off
Off
Red
Down
Any Open
Not Down and Locked
Off
On
Red
Down
Any Open
Down and Locked
Green
On
Off
NOTE: The emergency landing gear handle does not affect the indication logic.
The lights will operate as above when the landing gear moves.
Figure 8: LANDING GEAR INDICATIONS
1.
Both NLG and MLG are electrically controlled and
hydraulically operated
2.
Powered by 3000 psi pressure from HYD 1
Sg 1, fr 11
a.
Sequence of normal main gear/door extension
Video: Landing Gear
Sequence
NOTE: Extension and retraction commence
concurrently; however, all three gear/door
assemblies have their own hydraulic actuators
and do not necessarily complete the extend/
retract cycle at exactly the same time (although
they are within a few seconds of each other).
(9-98) Original
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