# SDR FDEA202112173105

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 17, 2021
- Submitted: December 20, 2021
- Operation: Air carrier
- Aircraft: [N774FD](https://openairdocs.org/aircraft/N774FD), registered now
- Make and model: Boeing 757-200 SERIES
- Registry model: [Boeing 757-200 SERIES](https://openairdocs.org/model/boeing-757-200-series) (OpenAirDocs)
- Aircraft serial: 26709
- Aircraft time: 74,382 hours, 27,451 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Controller
- Part number: 211738815
- Part serial: 47G0065
- Condition: Failed
- Location: N/A
- Stage of operation: CR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202112173105

## Discrepancy

LOST CABIN ALT AUTO 2 IN ROUTE, AUTO 1 WAS ALREADY  ON MEL          REMOVED AND REPLACED #2 AUTOMATIC PRESSURE  CONTROLER  REF AMM 21-31-2-4 OPS CHECK GOOD.

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