What was found
FRONT CRANKSHAFT OIL SEAL DETERMINED TO BE LEAKING, AND ALLOWING OIL TO DRIP INTO CABIN HEAT EXCHANGER ON MUFFLER, WHICH WAS THE SOURCE OF A SMOKE ODOR. SEAL REPLACED AND ACFT WAS GROUND RUN AND TEST FLOWN WITHOUT DISCREPANCIES.
- Difficulty date
- January 8, 2013
- Submitted
- January 15, 2013
- Operation
- General aviation
- Aircraft
- N738JX
- Make and model
- Cessna 172N
- Aircraft serial
- 17270024
- Aircraft time
- 9,113 hours
- Engine
- Lyc O320H2AD
- Engine time
- 4,670 hours
- System (JASC)
- 7810 · Engine Collector/Tailpipe/Nozzle
- Part
- Seal
- Part number
- LW13792
- Condition
- Leaking
- Location
- Heat Exchanger
- Part time
- 1,672 hours
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- B
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.