# SDR AC2A2022010913901

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 8, 2022
- Submitted: January 9, 2022
- Operation: Air carrier
- Aircraft: [N639MM](https://openairdocs.org/aircraft/N639MM), registered now
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Aircraft serial: 41216
- Aircraft time: 8,950 hours, 16,600 cycles
- System (JASC): [7530 · Compressor Bleed Control](https://openairdocs.org/jasc/7530)
- Part: Bleed Valve
- Part number: 54019205
- Part serial: XMA215
- Condition: Cracked
- Part time: 8,776 hours, 8,448 cycles
- Component: Engine, Pwc, PT6C67C
- Component part number: 304537901
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AC2A2022010913901

## Discrepancy

DURING TROUBLESHOOTING OF LOW POWER ON #1 ENGINE, #2 ENGINE BLEED VALVE WAS REMOVED TO SWAP WITH #1 ENGINE BLEED VALVE AND FOUND #2 BLEED VALVE SEALING DISC WAS CRACKED.  BLEED VALVE WAS REPLACED.

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