Service difficulty report · Rib · Piper PA31

Difficulty date
December 23, 1999
Submitted
January 22, 2001
Operation
Air carrier
Make and model
Piper PA31
Aircraft time
12,293 hours
Engine
Lyc TIO540A2B
Part
Rib
Part number
4004400
Condition
Cracked
Location
Rudder
Part time
12,015 hours
Component
4004626
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

(CAN) RUDDER TIP RIB AND FORWARD BRACING CHANNEL WERE FOUND TO BE CRACKED DURING A 1000 HR INSPECTION. CRACKS WERE FOUND AROUND THE NUTPLATES HOLDING THE BALANCE WEIGHT ON TOP OF THE RUDDER. HARDWARE SECURING THE WEIGHT BECAME LOOSE AND WAS UNDETECTED UNTIL NOW.SUBMITTER SUGGESTS THIS TO BE AN AREA OF CONCERN, PARTICULARLY ON OLDER AIRCRAFT.

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