# SDR CA140724002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2014
- Submitted: March 12, 2015
- Operation: General aviation
- Make and model: Dhav DHC2MKI
- Aircraft time: 18,316 hours
- Engine: Pwa R985*
- Propeller: Hamstd 2D30
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder
- Part number: 399354
- Condition: Cracked
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA140724002

## Discrepancy

(CAN) DURING SCHEDULED 100 HR INSPECTION, BROKEN OFF A PIECE OF CYLINDER NR 9 FOUND RESTING IN LOWER COWLING, FURTHER INVESTIGATION FOUND THE UPPER COWLING MOUNT BRACKET C/W REMAINING/BROKEN PIECE OF CYLINDER STILL ATTACHED IN COWL.  CYLINDER NR 9 PUSH ROD HOUSING FOUND HEAVILY DINTED AS WELL AFT FACE OF PROPELLER FOUND GOUGED/MARKED.  IT APPEARS THAT WHEN THE CYLINDER EAR FLANGE FAILED, PREVIOUS REPAIRED AT O/H. IT BOUNCED INTO THE ARC OF THE PROP WHILE IN OPERATION WHICH SENT IT BACK INTO THE PUSH ROD HOUSING CYLINDER ASSY.  REPLACED WITH O/H UNIT, PROPELLER REMOVED FOR FURTHER ASSESSMENT, REPAIR PHOTOS AVAILABLE.

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