# SDR 2005FA0000890

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 1, 2005
- Submitted: June 24, 2005
- Operation: General aviation
- Aircraft: N1249G
- Make and model: Cessna 310Q
- Registry model: [Cessna 310Q](https://openairdocs.org/model/cessna-310q) (OpenAirDocs)
- Aircraft serial: 310Q1100
- Engine: Cont IO470V
- Propeller: Mcauly 3AF32C87
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Condition: Cracked
- Location: Nr 1
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000890

## Discrepancy

FOUND CASE CRACKED BEYOND REPAIR AT NR 1 CYLINDER, FOUND 2 THRU BOLTS SHEARED AND 5 CYLINDER STUDS BROKEN ON NR 1 CYLINDER.  THRU BOLTS DEFECTIVE CAUSING A CHAIN REACTION IN SHEARING CYLINDER STUDS.  SINCE CYLINDER WAS NO LONGER SEATED SQUARELY TO THE CASE, THIS CAUSED THE CASE TO CRACK WHILE ENGINE WAS IN OPERATION.  (K)

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