Stow (Normal & Automatic)
After the engines have reached reverse-idle
rpm, (approximately 30%), the pilot can stow
the reversers by returning the reverser levers
to the full forward position. While the reverser
levers are deployed, the thrust levers are locked
at the idle position, but as the reverser levers
are returned to the stow position this lock is
released. Care should be taken not to move the
thrust levers forward when stowing the re-
verser levers.
When normal stow is initiated, the ECU will
move the control valve to the stow position and
the doors will retract and latch. The DEP an-
nunciations, on the EICAS, will extinguish
and the UNL display will momentarily illu-
minate during the stow cycle.
The thrust reverser stow command is auto-
matically initiated whenever unlock is indi-
cated by any two unlock switches (red UNL
annunciator illuminated) and the reverser
levers are forward of the idle deploy position.
This occurs during the normal stow cycle and
also to correct an abnormal condition inflight
(autostow). Autostow continues until no more
than one hook is in the unlocked position. An
amber UNL will illuminate on the ground if a
single unlock switch is indicating unlocked and
the thrust reverser is not fully deployed or de-
ploy has not been commanded (i.e. reverser
lever forward of idle deploy position). In this
case autostow is not commanded.
When the ECU initiates an autostow, it will
provide signals to the EICAS for indication
that an unlocked condition exists. While both
of these signals are present, the EICAS will
display a white “REV AUTOSTOW” message
(Figure 7-27).
Automatic Throttle Retard
When hydraulic pressure is applied to the stow
side of the primary actuators pressure is also
applied to the throttle snatch actuator. The
throttle retard actuator rotates the actuator
lever arm which meets with and moves the fuel
control lever arm to the idle thrust position.
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
7-40
FOR TRAINING PURPOSES ONLY
FlightSafety
international
130
110
90
70
50
30
AIRSPEED — KIAS
% of Takeoff N1
95
90
85
80
75
70
65
60
55
50
Figure 7-29. Reverser Thrust Limit Schedule