# SDR YAAA20150314002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2015
- Submitted: March 14, 2015
- Operation: Air carrier
- Aircraft: [N916AC](https://openairdocs.org/aircraft/N916AC), registered now
- Make and model: Cessna 207
- Registry model: [Cessna 207](https://openairdocs.org/model/cessna-207) (OpenAirDocs)
- Aircraft serial: 20700061
- Aircraft time: 13,296 hours
- Engine: Cont IO520F
- Engine time: 4,279 hours
- Propeller: Hartzl PHCC3YF1
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: IO520
- Part serial: PMA526A141328
- Condition: Cracked
- Location: Nr 1
- Part time: 1,119 hours
- Component: Engine, Cont, IO520F
- Component part number: IO520F
- Stage of operation: IN
- How discovered: B
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YAAA20150314002

## Discrepancy

DURING 100HR INSPECTION BORESCOPING ENG, FOUND THE NR 1 CYLINDER CRACKED FROM LOWER SPARK PLUG BOSS APPROX 1/2 INCH TOWARDS EXHAUST VLV SEAT.

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