TM 55-4920-432-13&P
SECTION IV - TROUBLESHOOTING
3-12 GENERAL
3-12
Troubleshooting at the Aviation Unit Maintenance (AVUM) level is limited to checking the system for indications
of normal operation and inspecting and replacing AC or DC cables and AC or DC fuses.
NOTE
Electrical components (except fuses and power cables) are factory calibrated and will not be replaced or
interchanged in the field or erroneous readings may result.
If the unit is inoperative, switch to alternate power source (AC to DC, DC to AC). Check the initial power source
for availability of power. If the source is functioning, inspect the appropriate power cable for signs of damaged,
shorted or open wiring, or a faulty connector. If the cable checks are reliable, proceed with next task.
3-13 PITOT AND STATIC SYSTEMS TESTER INSPECTION
3-13
THIS TASK COVERS:
INSPECTION
Initial set-up:
Personnel Required:
68 F Aircraft Electrician
Parts:
Pitot and Static Systems Tester, P/N 10005071
Equipment Condition:
Power Disconnected Tester on Work
Bench
a.
Examine tester cover for damage.
b.
Check that all operator panel and accessory components are accounted for and undamaged.
c.
Check latches, hinges, and catches for damage.
d.
Replace all missing parts: Refer to Appendix C.
e.
Clean all components.
END OF TASK
3-8
