Learjet 20 Series Pilot Training Manual page 86

Table 4-1.
Annunciator Cause for Illumination
There is less than .25 psi of fuel
L. FUEL PRESS
pressure to the indicated engine.
R. FUEL PRESS
Either or both spoilers are not
SPOILER
down and locked.
The entrance door is improperly
DOOR
closed or malfunctioning.
In flight—The wing/stab heat
STAB HEAT
switch is on, and the system has
failed.
On ground—The wing/stab heat
switch is on, but stab heat is dis-
abled by the right squat switch.
Either or both fuel filters are
FUEL FILTER
bypassing fuel.
Bleed-air pressure to the engine's
L. ENG ICE
front frame is less than 5 psi.
R. ENG ICE
The engine sync system is turned
ENG SYNC
ON with the nose gear extended.
One or both batteries' tempera-
BAT 140
ture is 140°F or more (nicad
battery-equipped airplanes only).
One or both batteries' tempera-
BAT 160
ture is 160°F or more (nicad
battery-equipped airplanes only).
Less than 450 pounds of fuel re-
LOW FUEL
mains in either wing in level
flight.
There is less than 5 psi oil pres-
LO OIL PRESS
sure to one or both engines.
In flight—Windshield duct tem-
WSHLD OV'HT
perature is 250°F.
On ground—Windshield duct
WSHLD OV'HT
heat is 215°F.
Nosewheel steering is engaged.
STEER ON
LEARJET 20 SERIES PILOT TRAINING MANUAL
ANNUNCIATOR ILLUMINATION CAUSES
FOR TRAINING PURPOSES ONLY
Annunciator Cause for Illumination
Either nacelle inlet temperature is
INLET HTR
above 190° F.
The indicated generator has
L GEN
failed or the switch is positioned
to OFF.
R GEN
Fuel transfer is in progress.
FUEL XFR
FUEL XFLO
Fuel crossflow
valve is open.
FUEL XFLO
On SNs 24-350 and subsequent
CAB ALT
and 25-227 and subsequent,
cabin altitude is above 8,750 feet
(±250 feet).
Steady—The switch is off or on,
L STALL
and the system has failed, or is
in the pusher range.
R STALL
Flashing— In shaker/nudger
range.
Right wing structure temperature is
WING OV'HT
more than 215°F.
The alcohol system has failed or
ALC AI
the alcohol tank is empty.
The inverter is off or failed.
PRI INV
SEC INV
Early Airplanes
Inverter has failed with the switch
PRI INV
on.
SEC INV
STBY INV
The inverter has failed with the
AUX INV
switch on.
Hydraulic pressure is less than
LO HYD PRESS
1,200 psi (approximately).
On SNs 24-350 and subsequent
L CAB AIR
and 25-227 and subsequent,
cabin air duct temperature is
R CAB AIR
more than 395°F.
FlightSafety
international
4-3