# SDR 98ZZZX1922

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N511AR
- Make and model: Cessna T303
- Registry model: [Cessna T303](https://openairdocs.org/model/cessna-t303) (OpenAirDocs)
- Aircraft serial: T30300192
- System (JASC): [7120 · Engine Mount Section](https://openairdocs.org/jasc/7120)
- Part: Bracket
- Part number: 643044
- Condition: Cracked
- Location: Lt Eng Up Inbd
- Part time: 4,904 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX1922

## Discrepancy

AT A 50-HOUR INSPECTION, FOUND LEFT ENGINE UPPER INBOARD MOUNT BRACKET P/N 643044 CRACKED AND SEPARATED .25 INCH.  UPON FURTHER INVESTIGATION, DISCOVERED LOWER INBOARD MOUNT P/N 643042 CRACKED IN TWO.  IT APPEARS THE LOWER MOUNT BROKE FIRST CAUSING THE UPPER MOUNT TO FAIL.  SUSPECT CAUSE APPEARS TO BE METAL FATIGUE CAUSED BY ENGINE VIBRATION.

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