TM 1-1520-238-MTF
Change 1
2-16
PROCEDURE
TROUBLESHOOTING
REFERENCE
AFTER STARTING APU (CONT)
**d. GEN 2 switch – GEN 2. Verify all
electrical system caution/warning
segments extinguished.
e. GEN 1 switch – OFF. Verify GEN 1
caution/warning segment
illuminates and RECT 1
caution/warning light is
extinguished.
f. GEN 1 switch – TEST. Verify GEN 1
caution/warning segment
extinguished; RECT 1 and MAN
STAB caution/warning segment
illuminated, and stabilator fail audio
present in headset. The GUN
caution/warning segment may also
be illuminated.
g. GEN 1 switch – GEN. Verify all
electrical system caution/warning
segments extinguished.
*3. EXT and INTR LT – Check, set as
required.
*4. ECS system – Test as follows:
a. Pilot STBY FAN switch – STBY
FAN, verify increased fan speed,
then NORM; verify return to normal
fan speed.
b. CPG STBY FAN switch – STBY.
Verify increased fan speed, then
OFF; verify return to normal fan
speed.
