
nose gear is up and locked and the main gear
advisory lights extinguish when the main gear
doors are closed.
The gear position lights are normally checked
through the GEAR test position on the system
test knob which is described later in this chap-
ter. However, illumination of the gear position
lights may also be tested by placing the air-
plane system test switch, located on the cen-
ter pedestal to the LTS (lights) position and
depressing the center “PUSH TO TEST” but-
ton. The three green DOWN lights and the
three black on white diagonally striped lights
(gear advisory annunciators) illuminate.
The gear position lights are automatically
dimmed when the navigation lights are on.
The intensity of the GEAR/HYD control panel
backlighting is controlled by the INSTR knob
located on the pilot’s crew lights control panel.
If the nose gear position green light fails to il-
luminate, confirmation of the nose gear in a
down and locked position is accomplished
through the nose wheel steering (NWS) sys-
tem. When the NOSE STEER switch is se-
lected on, the NWS ON indication is a valid
nose gear down-and-locked signal if no other
NWS monitor faults are present.
Should a main gear GREEN position light fail
to illuminate following gear extension illu-
mination of the taxi light when selected to
ON is valid confirmation that the corre-
sponding main gear is down and locked. To
avoid erroneous confirmation by a ground ob-
server insure that the recognition/landing light
14-4
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
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
CAS Message
Logic Summary
Type
Msg
W
W
C
C
C
W
GEAR
Any gear not down and flaps > 25
°
, or both TL < MCR and RA < 500'
NORM BRK FAIL
All brakes failed, L & R OUT & INBD collector, Emer brakes available
ANTI-SKID FAIL
Failure of one or more antiskid circuits/transducers, or switch is off
CPLT BRK FAULT
Copilot brake LVDT(s) 1,2,3,or 4 failed, use pilot's brake pedals
GEAR
RA invalid; both TL's < MCR; < 170 KIAS; < 14.5k' and any
gear not locked DN, or either gear door not up & locked.
or
> 210 KIAS; a gear in transition, or either main gear door not up & locked
EMER/PARK BRK
C
C
C
A
A
A
C
W = Warning
C = Caution
A = Advisory
L R INBD BRK FAIL
L or R, or L & R inboard normal brakes failed
L R OUTBD BRK FAIL
L or R, or L & R outboard normal brakes failed
PLT BRK FAULT
Pilot brake LVDT(s) 1,2,3, or 4 failed, use copilot's brake pedals
NWS FAIL
Nose wheel steering failed
BRAKE FAULT
Brake malfunction with minor system degradation.
NWS FAULT
Nose wheel steering fault, degraded operation
EMER/PARK BRK
Parking brake lever not fully released
Parking brake lever not fully released and thrust lever(s) at MCR or above
Table 14-1. LANDING GEAR AND BRAKES CAS MESSAGE DATABASE