TM 9--2350--292--20--1
0149 00--1
EXCESSIVE INTERFERENCE WITH APU RUNNING AND APU GENERATOR
SWITCH ON. MAIN ENGINE IS OFF AND VEHICLE IS STATIONARY.
0149 00
THIS WORK PACKAGE COVERS:
Excessive Interference With Apu Running And APU Generator Switch On. Main Engine Is Off And Vehicle Is
Stationary.
INITIAL SETUP:
Tools and Special Tools
General mechanics tool kit (item 1, WP 0717 00)
Equipment Conditions
Vehicle MASTER switch OFF (TM 9--2350--292--10)
Personnel Required
Two
WARNING
Remove rings, bracelets, wristwatches,
and neck chains before working on any
vehicle. Jewelry can catch on equip-
ment and cause injury, or may short
across an electrical circuit and cause
severe burns or electrical shock.
NOTE
If a steady whining interference is heard,
complete Step A. If interference is a low
frequency clicking go to Step B.
CONTINUED ON NEXT PAGE
no
yes
A
1. Open left side rear deck doors
(TM 9--2350--292--10).
2. Remove ground wire from APU voltage
regulator.
3. Thoroughly clean ground wire and ground
terminal. Reinstall ground wire.
4. Start APU and turn APU GEN switch and radio
ON (TM 9--2350--292--10). Listen for
interference.
5. Turn APU GEN switch and radio OFF and shut
down APU (TM 9--2350--292--10).
Is interference heard?
Fault corrected.
Replace voltage regulator
(WP 0239 00). Verify fault is
corrected.