# SDR YENA201707010556

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 1, 2017
- Submitted: July 5, 2017
- Operation: Air carrier
- Aircraft: [N789JB](https://openairdocs.org/aircraft/N789JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 4612
- Aircraft time: 27,085 hours, 8,994 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Fan
- Part number: EVT3454HC
- Part serial: 164901929
- Condition: Failed
- Location: E/E Bay
- Part time: 27,099 hours, 8,994 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA201707010556

## Discrepancy

LOW PITCH HUM AND VIBRATION DURING CRUISE AT MULTIPLE FLIGHT LEVELS.  APPEARED TO BE COMING FROM BELOW COCKPIT BEHIND CENTER & COUNSEL. F/A'S REPORTED SAME FROM FWD GALLEY.  R & R FAN EXTRACT BLOWER IAW AMM 21-26-51. OPS CHECKED OK.

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