T-45C TS, ADV & IUT ENG-12
Hydraulic Subsystems Malfunctions
PRESENTATION
I.
Unsafe gear on retraction
Fig 3: Landing Gear/
Door System
A. Indications
Operation
1. Landing gear handle light remains illuminated (red)
2. Gear retraction requires excessive time period
3. Normal sounds and feel of gear retraction not present
4. Landing gear door light remains lit
B. Verifications
1. One or more landing gear indicator lights (NOSE, LEFT, RIGHT)
may remain illuminated
NOTE: The NOSE, LEFT, and RIGHT lights illuminate green for
down and locked.
2. LDG GEAR DOOR light will remain illuminated
NOTE: If landing gear fails to fully retract, the system may also
identify a malfunction in the landing gear.
3. HYD 1 pressure gauge may indicate pressure loss
4. Wind noise/drag from landing gear/gear doors may be apparent,
and yaw may occur with one main down
C. Effects on flight safety
1. Airspeed restricted to less than 200 KIAS
2. Excess drag will increase fuel consumption
3. With gear jammed, extension may not be possible
4. If HYD 1 pressure gauge indicates pressure loss, emergency gear
extension may be required
II. Gear door malfunction
Fig 3: Landing Gear/
Door System
A. Indications: LDG GEAR DOOR light remains illuminated
Operation
NOTE: Landing gear retraction should occur in approximately
10 seconds, extension in approximately 15 seconds.
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(9-98) Original
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