# SDR 2009FA0000210

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 18, 2009
- Submitted: March 11, 2009
- Operation: General aviation
- Aircraft: [N5275S](https://openairdocs.org/aircraft/N5275S), registered now
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S9203
- Engine: Lyc IO360L2A
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder Head
- Part number: AEL85099
- Condition: Broken
- Location: Engine
- Part time: 1,920 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2009FA0000210

## Discrepancy

ACFT WAS DOING A STEADY CLIMB AFTER TAKEOFF WHEN HE HEARD A LOUD BANG AND LOST RPM.  PILOT LANDED THE PLANE BACK ON THE RUNWAY.  FUND THE CYLINDER HEAD ON NR 4 CYLINDER COMPLETELY BLOWN OFF.  PROBABLE CAUSE COULD POSSIBLY BE MORE DEFECTIVE CYL ASSY THAN CALLED OUT IN AD 08-19-05.  THIS CYL ASSY IS OUTSIDE THE SN RANGE.  RECOMMEND INSTALLING CYL ASSY.  (K)

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