TM 55-1510-221-10
Table 3-5. Action Codes and Recommended Actions
Code
Recommended Action
01
02
03
04
05
Shut down INS.
Watch for degradation (NAV), During ground operation, downmode to STBY and restart
alignment.
INS may be used for navigation. One or more analog outputs are not functioning properly. Check
26 VAC circuit breakers, HSI and autopilot.
Downmode to STBY and restart alignment (ground operation only).
Correct problem in interfacing system (could be INS). Will not seriously affect performance.
3-75
