# SDR UIEA2021020900255

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2021
- Submitted: February 12, 2021
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 99,587 hours, 20,664 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21173888
- Part serial: 12A0211
- Condition: Malfunctioned
- Location: Cabin Pressure
- 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/UIEA2021020900255

## Discrepancy

AT FL 400 CREW GOT A VIBRATION AND NOTICED RATE INDICATOR ON PRESS PANEL FLUCTUATING UP AND DOWN(<P>REF AP-19049, REPLACED OUTFLOW VALVE ASSY IAW AMM 21-31-03, OPS CK GD. REMOVED AND REPLACED #2 AUTO PRESSURE CONTROLLER IAW AMM 21-31-02 OPS CK GD.</P><P>VALVE S/N OFF 99-1097  P/N OFF 606832-21</P>)

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