Service difficulty report · Fork · Cessna 172N

Difficulty date
August 18, 2008
Submitted
November 3, 2008
Operation
General aviation
Make and model
Cessna 172N
Aircraft time
6,592 hours
Engine
Lyc O320D2J
Propeller
Mcauly 1C160DTM
Part
Fork
Condition
Cracked
Location
Nlg
Part time
6,816 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

(CAN) DURING A ROUTINE OPERATION, NR 2 INSP, A SUSPECTED CRACK WAS FOUND ON NLG FORK. EDDY CURRENT REVEALED A LARGE DEFLECTION IN THE SUSPECTED AREA. SUBSEQUENTLY THE INSP WAS CONDUCTED ON THE OPPOSITE SIDE OF THE NLG FORK WITH THE SAME RESULTS. ADDITIONALLY FPI WAS ALSO DONE TO SHOW VISUALLY UNDER BLACK LIGHT. CRACKS WERE CLEARLY VISIBLE ON BOTH SIDES OF THE FORK UNDER THE BLACK LIGHT. THE ACFT WAS REMOVED FROM SERVICE AND A NEW NLG FORK ASSY WAS ORDERED FROM MFG AND INSTALLED UPON ARRIVAL.

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