# SDR N3XR201610170001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2016
- Submitted: October 17, 2016
- Operation: General aviation
- Filed by: [Embry-Riddle Aeronautical University Inc, repair station N3XR816N](https://openairdocs.org/faa-repair-station/N3XR816N/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: N429ER
- Make and model: Cessna 172S
- Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (OpenAirDocs)
- Aircraft serial: 172S11452
- Aircraft time: 2,121 hours
- Engine: Lyc IO360L2A
- Engine time: 2,121 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: L12427
- Condition: Cracked
- Location: Nr 1
- Part time: 2,121 hours
- 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/N3XR201610170001

## Discrepancy

DURING A ROUTINE INSPECTION, THE BAFFLING IN FRONT OF THE NR 1 CYLINDER SHOWED SIGNS OF HEAT DAMAGE. FURTHER INVESTIGATIONS REVEALED THAT A CRACK HAD DEVELOPED IN THE AREA OF THE HEAD/BARREL PORTION OF THE CYLINDER AT THE 3 O'CLOCK POSITION AS VIEWED FROM THE VALVE COVER.

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