T-45A UJPT, E2-C2, ADV, & IUT Eng-26
Engineering Review
(3) Extend/retract switch: three-
position switch located on throttle
grip controls deployment of speed
brakes; aft--speed brakes out, fwd-
-speed brakes in, spring-loaded to
center
c.
Operating characteristics
(1) At speeds greater than 380 KIAS,
speed brakes blow back from full
extension
(2) May not fully extend above
340 KIAS
(3) Cockpit selecting RETRACT
overrides cockpit selecting EX-
TEND
(4) No provisions for extending or
retracting speed brakes in event of
HYD 1 failure
D.
Aircraft systems interfaces
1.
Hydraulic system
a.
Ailerons and stabilator are tandem
actuator design--failure of one
hydraulic system does not affect
operation
b.
Flaps interface with HYD 1 only--
wheel brake/emergency flap
accumulator provides backup power in
event of failure
c.
Slat system has no redundancy
d.
Speed brake system has no
redundancy
Page 26-56
(8-03) Original
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