SDR 20000531SH006

Service difficulty report · Seal · Cessna 172S

Difficulty date: May 2, 2000
Submitted: May 31, 2000
Operation: General aviation
Aircraft: N502ER
Make and model: Cessna 172S
Aircraft serial: 172S8002
Engine: Lyc IO360L2A
System (JASC): 8540 · Reciprocating Engine Rear Section
Part: Seal
Part number: 06A19956
Condition: Failed
Location: Accessory Sect
Part time: 1,512 hours
Stage of operation: AP
How discovered: O
Nature of condition: K, J
Precautionary procedure: O

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

What was found

DURING FINAL APPROACH, PILOT NOTED LOW OIL PRESSURE INDICATION. DURING INVESTIGATION OF OIL LOSS, IT WAS NOTED THAT THE OIL SEAL LIP WAS TURNED OUTWARD AND THE TENSION SPRING WAS MISSING. APPROXIMATELY 1 QUART OF OIL REMAINED IN THE OIL SUMP. SEAL WAS IN LOWER VACUUM PUMP ADAPTER. (X)

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