# SDR CA980706013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Engine: Lyc O320H2AD
- Propeller: Mcauly 1C160DTM
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankshaft
- Part number: LW15944
- Condition: Corroded
- Location: Engine
- Part time: 3,144 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA980706013

## Discrepancy

(CAN) A VISUAL INSPECTION OF THE INNER DIAMETER OF THE CRANKSHAFT SHOWED VISIBLE CORROSION PITTING (AD 98-02-08 REFERS).  AN ON-WING FLUORESCENT PENETRANT INSPECTION (FPI), CARRIED OUT BY A SUITABLY RATED AMO, FOUND NO CRACKS.  FURTHER MEASURING OF THE INNER DIAMETER SHOWED THE INSIDE DIAMETER TO BE WITHIN THE MAXIMUM AS STATED IN LYCOMING SERVICE BULLETIN 505B.

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