T-45C TS, ADV & IUT ENG-11
Hydraulic Subsystems
d.
Setting HOOK control to UP operates toggle
mechanism that opens a selector valve and
applies hydraulic pressure to actuator/damper,
retracting hook
e.
Retracts in approximately 6 seconds
f.
Retracts hydraulically by 3000 psi pressure
from HYD 1
4.
Limitations: retraction of hook is not possible
following HYD 1 failure
5.
Summary:
The arresting hook is extended by gravity free-fall
and a nitrogen charged actuator/damper. It is held
in place by the actuator/damper. Hook retraction
requires hydraulic power from the HYD 1 system.
Cockpit controls and indicators used to operate the
arresting hook system include the arresting HOOK
handle, the arresting HOOK warning light, and the
HOOK BYPASS switch.
SELECTOR
VALVE
YD 1 RETURN
YD 1 PRESSURE
HOOK
H
O
O
K
UPLATCH
ASSEMBLY
ACTUATOR DAMPER
LEGEND
HYD 1 RETURN
HYD 1 PRESSURE
NITROGEN PRECHARGE
Figure 23: ARRESTING HOOK OPERATION
Page 11-47
(9-98) Change 4
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