TM 55-1520-240-T
7-8.6 APU MOTORS BUT DOES NOT START, ESU BITE INDICATES
OR THEN (HYDRAULIC FAULT) (Continued)
CHECK APU PUMP FAULT
LIGHT IS IT ON?
REPLACE
APU MOTOR
PUMP.
CONNECT EXTERNAL
HYDRAULIC SOURCE. TO
UTILITY SYSTEM. REFER TO
TM 55-1520-240-23. APPLY
HYDRAULIC POWER.
ATTEMPT APU START. REFER
TO TASK 15-1.4. DOES APU
START?
MODULE ACCUMULATOR
DOES IT INDICATE AT LEAST
DOES APU HAVE
HISTORY OF
REPLACE APU.
HOT STARTS?
REMOVE HYDRAULIC POWER.
REPLACE APU MOTOR PUMP.
ATTEMPT APU START REFER
TO TASK 15-1.4. DOES APU
START?
REMOVE HYDRAULIC SOURCE
REPRESSURIZE UTILITY
SYSTEM CHECK APU START
FAULT
CORRECTED
3000 Psi?
REPLACE APU START
MODULE ACCUMULATOR
CHECK APU START
ACCUMULATOR. DOES IT
INDICATE AIR PRECHARGE?
REFER TO TM 55-1520
240-23.
SERVICE ACCUMULATOR.
7-8.6
END OF TASK
Change
7-219/(7-220 Blank)