# SDR ZESA2008019

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 29, 2008
- Submitted: April 30, 2009
- Operation: Air carrier
- Aircraft: [N44M](https://openairdocs.org/aircraft/N44M), registered now
- Make and model: Cessna 680SOV
- Aircraft serial: 6800183
- Aircraft time: 1,114 hours, 718 cycles
- Engine: Pwc PW306C
- Engine time: 1,114 hours, 718 cycles
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Part number: 31B57590131B5756
- Condition: Vibration
- Location: Zone 400
- Part time: 1,114 hours, 718 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ZESA2008019

## Discrepancy

AN ENGINE VIBRATION WAS NOTICED BY CREWS IN FLIGHT AT 50-52 PERCENT N1.  MFG ADVISED THAT THIS IS NORMAL AND CAUSED BY A BLEED AIR VALVES TRANSITIONING.  ON 10/10/2008 TWO BLEED AIR VALVES WERE REMOVED AND REPLACED.  THERE HAS NOT BEEN AN ISSUE SINCE.

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