SDR 2003F00256

Service difficulty report · Tube · Piper PA31350

Difficulty date
February 19, 2003
Submitted
May 20, 2003
Operation
Air carrier
Aircraft
N509FN
Make and model
Piper PA31350
Aircraft serial
317952162
Part
Tube
Part number
4550404
Condition
Oversized
Location
Piston
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

PILOT REPORTED RT MLG OLEO STRUT STICKING IN THE EXTENDED POSITION & NOT READILY COMPRESSING. AFTER REMOVAL FROM A/C, RT MLG WAS DISASSEMBLED TO DISCOVER THAT RETAINING PINS THAT SECURED TOP BEARING TO STRUT PISTON TUBE HAD PASSED CLEAR THROUGH INTO PISTON TUBE BORE & WERE BINDING UP ON ORFICE TUBE AND HAD MIGRATED TO BETWEEN PISTON TUBE & TRUNNION BORE, BINDING THERE ALSO. FURTHER INVEST CLEARLY REVEALED THAT A PREVIOUS OWNER/OPERATOR HAD ENLARGED RATAINING PIN HOLES IN TOP OF CHROME PISTON TUBE FROM FACTOR SPECS OF .250 IN DIAMETERS TO IN EXCESS OF .310 IN DIAMETER WHICH ALLOWED RETAINING PINS TO BECOME DISLODGED INSTEAD OF BEING LOCKED IN PLACE. LT MLG WAS REMOVED & DISASSEMBLED TO DISCOVER SAME CONDITION

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