# SDR 2026FA0000164

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 10, 2026
- Submitted: March 10, 2026
- Operation: General aviation
- Engine: Lyc O320*
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder Head
- Part number: LW12416
- 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/2026FA0000164

## Discrepancy

I HAVE MULTIPLE CRACKED CYLINDERS BETWEEN O-320-D2J AND O-320-D3G ENGINES, THE CYLINDER IS ALL CRACKING IS IN THE SAME LOCATION NEAR THE INTAKE PORT OF THE CYLINDER.  THE FAILURE TIMES HAVE BEEN BETWEEN 1087.1 SFRM, 1980.5 SFOH, 1282.1 SFRB, MOST RECENTLY I HAVE HAD 2 CRACKS ON CUSTOMER AIRCRAFT AT 600 SMOH AND 500 SFRM.  THE COMMON POINT IN ALL THESE FAILURES IS ALL CYLINDERS ARE LYCOMING FACTORY CYLINDERS

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