23. AC external power - Connect as required.
annunciator light on the mission control
panel is illuminated if AC external power is
*24. Annunciator panels - Test as fol-
a. Check illumination of the MASTER
CAUTION, MASTER WARNING, #1
FUEL PRESS, #2 FUEL PRESS, L BL
AIR FAIL, R BL AIR FAIL, INST AC
warning lights, #1 DC GEN, #2 DC GEN,
#1 INVERTER, #2 INVERTER, #1 NO
FUEL XFR, #2 NO FUEL XFR, and
b. Annunciator test switch - Press and hold.
Check that all lights in both annunciator
panels, FIRE PULL handle lights,
CAUTION, and MASTER WARNING
lights are illuminated. Release switch
and check that all lights except those in
step (a) are extinguished.
c. Master caution and master warning lights
- Press and release. Both lights should
*25. Stall and gear warning system -
Check as follows: