SDR CSL2003F00000

Service difficulty report · Seal · Cessna 414

Difficulty date: July 2, 2003
Submitted: July 17, 2003
Operation: Air carrier
Aircraft: N515ST
Make and model: Cessna 414
Aircraft serial: 4140169
Engine: Cont TSIO520*
System (JASC): 8550 · Reciprocating Engine Oil System
Part: Seal
Part number: 641250
Condition: Leaking
Location: Crankshaft
Part time: 1,259 hours
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

ENGINE OIL SEEN LEAKING UPON DESCENT FROM 20,000 FT, LEAK TRACED TO CRANKSHAFT OIL SEAL. UPON REMOVAL SEAL WAS FOUND TO BE SEVERELY WORN ON SEALING EDGE, TO THE POINT OF BEING WORN THROUGH, AROUND APPROX 50 PERCENT OF ITS SURFACE. NEW SEAL SOLVED PROBLEM, OLD SEAL APPEARED WEATHER CHECKED.

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