TM 5-6675-250-20
2 - 1 0 . T R O U B L E S H O O T I N G ( C o n t i n u e d)
Table 2-3. Troubleshooting (Continued)
M A L F U N C T I O N
TEST OR I N S P E C T I ON
CORRECTIVE ACTION
GYROSCOPIC REFERENCE UNIT (GRU) (Continued)
b. Replace a defective GRU (1) with a new one, by placing Mode Select
Switch (2) in PWR OFF position (3) and disconnecting and connect-
ing power cable (4) to GRU (1).
c.
Report defective GRU to Direct Support Maintenance.
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