are also used to pull the door closed from in-
side the airplane.
The key switch is used to secure the door from
the outside. By inserting a key into the switch
and turning it in one direction, the actuator
motor drives the hooks to engage the upper
door. Turning it in the other direction releases
the hooks to permit opening the door.
NOTE
Anytime the airplane is occupied
with the entry doors locked, the
hooks must be released. This per-
mits opening the upper door for
emergency egress.
The red DOOR light illuminated means:
• Any one of the 10 latch pins is not en-
gaged with its respective microswitch.
• The hooks are not disengaged from the
door and fully retracted.
• The door may be unsafe for takeoff.
A hollow neoprene seal surrounds the door-
frame; the seal has holes to allow the entry of
pressurized cabin air, forming a positive seal
around the door.
Emergency Exit
A hatch near the right rear of the cabin serves
as an emergency exit on all Learjet 20 models
(Figure 1-11).
The hatch can be opened from the inside on all
models by a latch handle located at the top cen-
ter of the window. The latch must be pulled in-
ward to unlock; a continued inward pull
releases the hatch from the lower retainers.
1-11
FOR TRAINING PURPOSES ONLY
LEARJET 20 SERIES PILOT TRAINING MANUAL
FlightSafety
international
Figure 1-11. Emergency Exit
