# SDR 20030779

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 5, 2005
- Submitted: January 6, 2005
- Operation: Air carrier
- Aircraft: [N122UX](https://openairdocs.org/aircraft/N122UX), registered now
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE122
- Aircraft time: 18,129 hours, 26,265 cycles
- Propeller: Hartzl HCE4A3I
- System (JASC): [6110 · Propeller Assembly](https://openairdocs.org/jasc/6110)
- Part: Propeller
- Part number: HCE4A3I
- Part serial: HJ558
- Condition: Defective
- Location: Lt Engine
- Part time: 16,330 hours
- Stage of operation: IN
- How discovered: C
- Nature of condition: E
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20030779

## Discrepancy

WHILE MAINTENANCE WAS PERFORMING A PRE-RELEASE AUTOFEATHER TEST, UNUSUAL VIBRATION WAS NOTED COMING FROM LT ENGINE AND PROP.  ENGINE WAS SHUTDOWN WITHOUT INCIDENT AND UPON INVESTIGATION INTERNAL FAILURE WAS OBVIOUS DUE TO BLADE MOVEMENT.  PROPELLER REMOVED FROM AIRCRAFT FOR TEARDOWN INVESTIGATION AND SPECIAL SOAP SAMPLE WAS TAKEN.

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