craft to field elevation. The system rate con-
trols the cabin toward the outside pressure for
60 seconds. The maximum rate of cabin alti-
tude decrease is 300 fpm, and the maximum
rate of increase is 500 fpm.
After the 60 seconds of rate control during
the landing mode, the controller enters the
ground mode where the outflow valves are
driven full-open.
If the throttles are advanced within 60 seconds
of landing (as in a touch and go landing), the
CPCS immediately enters the takeoff mode.
MANUAL MODE
The MANUAL PRESS switch (Figure 12-1)
can be depressed to select manual operation.
When the MANUAL PRESS switch is de-
pressed, the “ON” legend will illuminate in the
S/I and a white CAB PRESS MAN message
will be displayed on the CAS. There is no op-
tion for the crew to choose which channel is
active (auto or manual).
Loss of valid input from both ADCs is the
only condition that will cause the CPC to au-
tomatically revert to the manual mode. In this
case, the CPC annunciates a flashing “ADC”
on the LCD, an amber “CAB PRESS MAN”
message will be displayed on the CAS, and
“ON” will illuminate in the MANUAL PRESS
12-16
FOR TRAINING PURPOSES ONLY
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
FlightSafety
international
+ 1K
+ 2K
+ 3K
+ 4K
+ 5K
+ 6K
1,000 FT
DESCENT DETECTED
AIRCRAFT ALTITUDE
≤
6,000 FT
ABOVE TAKE-OFF FIELD ELEV
WITHIN 10 MIN OF LIFT-OFF
10 MIN
CABIN DESCENDS TO T/O
ELEVATION (375 fpm MAX)
CABIN ON DESCENT
SCHEDULE TOWARD
SET LANDING FIELD
ELEV (375 fpm MAX)
TIME
CABIN ON
CLIMB SCHEDULE
LIFT-OFF
T/O FIELD
ELEVATION
ALTITUDE
AIRCRAFT CLIMB
Figure 12-8. Controller — Flight Abort Mode