SDR 2004FA0000424

Service difficulty report · Doubler · Cessna 172N

Difficulty date: May 29, 2004
Submitted: May 29, 2004
Operation: General aviation
Aircraft: N734BZ
Make and model: Cessna 172N
Aircraft serial: 17268738
Aircraft time: 3,695 hours
System (JASC): 5412 · Nacelle/Pylon, Bulkhead/Firewall
Part: Doubler
Part number: 05131092956
Condition: Corroded
Location: Firewall
Part time: 3,695 hours
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

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

What was found

DURING ANNUAL INSPECTION FOUND POPPED RIVET HEADS IN FIREWALL DOUBLERS, REMOVED DOUBLERS FOUND EXFOLIATION EXCEEDING 40 PERCENT THICKNESS ON BACK SIDE OF DOUBLERS, REPLACED DOUBLER, RECOMMEND CLOSE INSPECTION OF RIVET HEADS IN THIS AREA.

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