TM 1-1520-238-T-6
9–775
9–411.
SQUAT SWITCH SYSTEM – MAINTENANCE OPERATIONAL CHECK (cont)
9–411
NOTE
Refer to pilot station (fig. 9–246) for configuration and component
locations.
If referenced out of one paragraph or volume into another for additional
troubleshooting, upon completion of the task, return to the maintenance
operational check for the original paragraph or volume.
1. Perform maintenance operational checks as follows:
Task
Result
a. On pilots circuit breaker panel (fig. 9–247),
check that the following circuit breakers stay
closed: MISSION EL DC (CB93), MISSION
FC DC (CB50), ASE DC (CB28), COMM
IFF (CB29), ECS CANOPY ANTI-ICE
(CB70).
If MISSION EL DC circuit breaker (CB93) does not
stay closed, refer to TM 9-1090-208-23-2 to
troubleshoot external stores control system.
If MISSION FC DC circuit breaker (CB50) does not
stay closed, refer to TM 9-1230-476-20-2 to
troubleshoot fire control system.
If ASE DC circuit breaker (CB28) does not stay
closed, refer to TM 1-1520-238-T-7 to troubleshoot
DASE.
If COMM IFF circuit breaker (CB29) does not stay
closed, refer to TM 11-1520-238-23-2 to troubleshoot
IFF.
If ECS CANOPY ANTI-ICE CONTR circuit breaker
(CB70) refer to TM 1-1520-238-T-8 to troubleshoot
canopy anti-ice system.
b. On pilot master caution/warning panel
(fig. 9–248), press and hold PRESS TO
TEST switch.
If ARM/SAFE indicator is not lighted, replace lamp
(TM 1-1520-238-23). If lamp still does not light, go to
paragraph 9–333 to troubleshoot pilot caution/warning
system.
c. Check audio at right wing ICS. On pilot FIRE
CONTROL panel (fig. 9–249), set MASTER
switch to SAFE.
If audio is not present and SAFE light on pilot
ARM/SAFE indicator is lighted, go to
paragraph 9–413.
d. Install squat switch fixture (fig. 9–250)
(TM 1-1520-238-23).
