# SDR A8OA201207100001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2012
- Submitted: July 10, 2012
- Operation: Air carrier
- Aircraft: [N60MJ](https://openairdocs.org/aircraft/N60MJ), registered now
- Make and model: Beech 1900D
- Registry model: [Beech 1900D](https://openairdocs.org/model/beech-1900d) (OpenAirDocs)
- Aircraft serial: UE60
- Aircraft time: 30,541 hours, 41,667 cycles
- Engine: Pwc PT6C67D
- Engine time: 23,326 hours, 29,150 cycles
- Propeller: Hartzl HCE4N3
- System (JASC): [6123 · Propeller Feathering/Reversing](https://openairdocs.org/jasc/6123)
- Part: Pcb
- Part number: 1293640919
- Part serial: 789J96
- Condition: Failed
- Location: Autofeather Sys
- Part time: 6,000 hours, 8,500 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: S
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/A8OA201207100001

## Discrepancy

NR 1 PROPELLER ATTEMPTED TO FEATHER IN FLIGHT WITH AUTOFEATHER ARMED.  TROUBLESHOT AND FOUND 2 BAD DIODES ON PCBA123.  REPLACED DEFECTIVE PC BOARD WITH INSPECTED UNIT.  OPS CHECKED GOOD.  NO FURTHER OCCURRENCES.

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