Service difficulty report · Grounding Strap · Cessna 172M

Difficulty date
April 14, 2011
Submitted
September 14, 2015
Operation
General aviation
Make and model
Cessna 172M
Aircraft time
3,398 hours
Engine
Lyc O320E2D
Propeller
Mcauly 1C160DTM
Part
Grounding Strap
Part number
101025
Condition
Cracked
Location
Alternator Case
Part time
122 hours
Stage of operation
CR
How discovered
O
Nature of condition
H
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) AIRCRAFT EXPERIENCED INTERMITTENT ELECTRICAL FAILURE DURING FLIGHT. ALTERNATOR INSPECTED AND GROUNDING STRAP, PN 10-1025 ON REAR CASE FROM THE F2 TERMINAL TO CASE GROUND WAS FOUND TO BE CRACKED THROUGH. THE GROUND STRAP WAS STILL IN CONTACT WITH THE CASE. THE ALTERNATOR TESTED SERVICABLE UNTIL AN ELECTRICAL LOAD WAS APPLIED. GROUND STRAP WAS REPAIRED AND ALTERNATOR WAS FUNCTION CHECKED SERVICABLE.

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