Section IV. MAINTENANCE PROCEDURES
This section has inspection, operational check, and repair procedures.
Normally you should do maintenance in this order:
Inspection. Check if the dra is damaged or incomplete. Replace any damaged or missing components.
b. Troubleshooting, Done on faulty dra noted in operation or during operational check. Do not troubleshoot
c. Repair. The repair procedures are used to restore a faulty dra to serviceable/operable condition. Repair
is by replacement of bad module or part.
d. Placing in Service. After bad item have been replaced, the dra must be retested using operational check.
When the dra is working, it may be placed in service,
Many faults can be found by inspection. If any are found, replace the bad item. The following chart can be used
as a guide.
Access cover and chassis
No cracks or dents.
No loose or missing screws.
No broken or missing pins.
4-15. OPERATIONAL CHECK
Do the operational check in paragraph 411 to verify correct dra operation.
consists of removing a bad item and installing another.
General Instructions. The following instructions apply to all repair tasks.
Remove any cables connected to the dra.
Inspect the dra for damage. Repair any obvious physical damage.
Handle all modules carefully.
Before installing a module, check the connector for bent or broken pins. Do not install if damaged.
Perform operational check before returning to service.