b. Defective stall warning test system.
c. Defective wiring.
d. Defective stall warning computer.
Both inverters inoperative.
a. Defective wiring in inverer system.
One inverter inoperative.
a. Tripped inverter circuit breaker (on DC
power distribution panel beneath floor).
b. Loose or corroded ground connection.
c. Defective wiring to inverter.
Battery charge annunciator light inoperative.
a. Defective light bulb.
b. Connections on battery shunt loose or cor-
c. Defective battery charge monitor module.
One portion of interior lighting or lighting con-
trol system inoperative.
a. Defective light circuit board or wheat lights.
b. Defective components in overhead control
c. Defective power supply.
Fuel crossfeed valve inoperative or FUEL
PRESS annunciator light remains illuminated.
a. Defective standby fuel pump.
b. Defective crossfeed valve.
Standby fuel pump inoperative.
a. Defective standby pump.
b. Defective switch in fuel management panel.
Pneumatic surface or antenna deice system inop-
a. Defective surface deice time delay module.