T-45C TS, ADV & IUT ENG-12
Hydraulic Subsystems Malfunctions
IX. Tail hook malfunctions in the landing phase
Fig 7: Tail Hook
System Operation
A. Indications
1. Arresting hook handle warning light (red) remains illuminated
following commanded EXTEND
NOTE: Arresting hook extension should occur within 1.5 seconds.
2. Arresting hook handle warning light may illuminate intermittently
NOTE: Intermittent illumination of the arresting hook handle red
light indicates that the arresting hook is bouncing--a condition
caused by a malfunctioning hydraulic actuator/vertical damper.
3. Arresting hook handle light remains illuminated for more than
6 seconds following commanded RETRACT
B. Verifications: other aircraft/tower visual inspection, if available
C. Effects on flight safety
1. Arrested landing not possible if hook fails to extend
2. Hook skip may prevent normal arrested landing
SELECTOR
VALVE
HYD 1 RETURN
HYD 1 PRESSURE
HOOK
H
O
O
K
UPLATCH
ASSEMBLY
ACTUATOR DAMPER
LEGEND
HYD 1 RETURN
HYD 1 PRESSURE
NITROGEN PRECHARGE
Figure 7: TAIL HOOK SYSTEM OPERATION
(9-98) Original
Page 12-13
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