# SDR 2010FA0000791

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2010
- Submitted: August 6, 2010
- Operation: General aviation
- Aircraft: [N6470H](https://openairdocs.org/aircraft/N6470H), registered now
- Make and model: Cessna 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (OpenAirDocs)
- Aircraft serial: 20700534
- Engine: Cont IO520F
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: SA52006A1
- Part serial: 526A086893
- Condition: Cracked
- Location: Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2010FA0000791

## Discrepancy

UPON ENGINE DISMANTLE FOR O/H, 5 OUT OF 6 CYLINDERS HAD CRACKED CYLINDER HEADS.  THE CRACKS ORIGINATED AT THE LOWER SPARK PLUG HOLE AND RADIATED OUT A THE 4 O`CLOCK POSITION FOR APPROX 1 INCH.  AFFECTED SN: 4/ 526-A08-6893. NOTE: THIS INFO WAS SUBMITTED BY AN UNKNOWN PERSON TO THE AL03 FSDO. NO OTHER INFO AVAILABLE.

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