4L-6 Developed for Training Purposes Leerjet 35/36
February 1998
CAE SimuFlite
Autostow
When the ARM switch is in the OFF position, if any one of the
latch switches shows unlatched, the DEPLOY light flashes. If
any two door latches on the same side (inboard or outboard),
move toward the unlock position, the ARM light illuminates to
indicate activation of the autostow cycle. The DEPLOY annun-
ciator flashes to indicate a malfunction in the latches. During
the autostow cycle, the hydraulic selector valve positions to
STOW and applies hydraulic pressure to the thrust reverser
door actuator to hold them closed. The steady ARM light and
the flashing DEPLOY light continue until one of the latches
returns to a safe position or power is removed from the
reverser system.
Automatic Throttle Retard
The automatic throttle retard system is designed to minimize
the effect of asymmetrical thrust should a thrust reverser
deploy inadvertently in flight. Anytime the stow solenoid valve
is energized, hydraulic pressure from the stow line operates a
springloaded actuator that moves the thrust lever and the fuel
control unit to the IDLE position.
Accumulator
The thrust reverser system incorporates an air-hydraulic accu-
mulator that provides enough hydraulic fluid and pressure for
one full deploy cycle in the event of a hydraulic system failure.
The accumulator precharge is 900 to 1,000 PSI.
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