Service difficulty report · Rib · Piper PA31350

Difficulty date
May 23, 2001
Submitted
June 8, 2001
Operation
Air carrier
Aircraft
N13FS
Make and model
Piper PA31350
Aircraft serial
318352024
Aircraft time
3,692 hours
Part
Rib
Part number
4044000
Condition
Cracked
Location
Rudder
Part time
3,692 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

WHILE C/U CHECKLIST ITEM FOR RUDDER BALANCE WEIGHT ON ANNUAL INSPECTION: FOUND WEIGHT LOOSE, YET BOLTS WERE TIGHT. INVESTIGATION SHOWED UPPER RIB ON RUDDER BROKEN OUT UNDER BALANCE WEIGHT. THIS ITEM INSPECTED 149 HOURS PREVIOUS AND FOUND TIGHT. PERIODIC REMOVAL OF BALANCE WEIGHT TO CHECK STRUCTURE FOR CRACKS NEEDED. COULD CAUSE LOSS OF CONTROL OF AIRCRAFT, CANNOT SEE STRUCTURE WITHOUT REMOVING CAP AND WEIGHT.

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