TM 55-1510-222-CL
NOTE
The Marker Beacon lights will illuminate only if the Avionics Master is turned ON/ EXT PWR as
applicable.
3.
MASTER CAUTION and MASTER WARNING annunciators - Press and release. Both annunciators should
extinguish.
AC/DC POWER
1.
AC frequency - 394 - 406 Hz.
2.
AC voltage - 104 - 124 VAC.
3.
DC voltage - 28 - 28.5 VDC.
AUTOMATIC FLIGHT CONTROL SYSTEM
1.
Altitude alert.
NOTE
Pause a few seconds between each step to allow time for the proper indications.
a.
Set alert controller more than 1000 feet above altitude indicated on pilot's altimeter. The pilot's altimeter
alert annunciator should be extinguished.
b.
Decrease the alert controller to within 1000 feet of the pilot's altimeter setting. The alert annunciator
should illuminate.
c.
Decrease the controller to less than 250 feet above the pilot's altimeter setting. The alert annunciator
should extinguish.
d.
Increase the controller to 300 ± 50 feet above the pilot's altimeter indication and check that the alert
annunciator illuminates.
P-4
