TM 55-1510-222-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
17. DC GPU - As required.
18. External power advisory annuncia-
tor light - Check for appropriate in-
dication.
19. Battery switch - ON.
*20. DC power - Check, 24 VDC mini-
mum for battery starts, 28 VDC
maximum for GPU starts.
C12
21. AC external power - Connect as re-
quired. Check that the EXT AC
PWR ON annunciator light on the
mission control panel is illuminat-
ed.
*22. Annunciator panels - Test as fol-
lows:
D1-4
a. MASTER CAUTION. MAS-
TER WARNING, #1 FUEL
PRESS, #2 FUEL PRESS.
GEAR DN, L BL AIR FAIL, R
BL AIR FAIL. and INST AC
warning lights; and #1 DC
GEN, #2 DC GEN, #1 NO
FUEL XFR, #2 NO FUEL
XFR, #1 INVERTER, #2 IN-
VERTER, CABIN DOOR (if
open), and REV NOT READY
caution/advisory lights - Check
illuminated.
b. ANNUNCIATOR
TEST
switch - Press and hold. Check
that the annunciator panels,
FIRE PULL handle lights,
marker beacon lights, ANT Az-
imuth
indicator,
MASTER
CAUTION
and
MASTER
WARNING lights are illumi-
2-13
