# SDR AALA202002039036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2020
- Submitted: February 3, 2020
- Operation: Air carrier
- Aircraft: N938UW
- Make and model: Boeing 757-2B7
- Registry model: [Boeing 757-2B7](https://openairdocs.org/model/boeing-757-2b7) (OpenAirDocs)
- Aircraft serial: 27246
- Aircraft time: 80,074 hours, 28,278 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21173886
- Part serial: 35784
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 106,687 hours, 34,926 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202002039036

## Discrepancy

AIRCRAFT WAS GROUNDED: CABIN PRESS LOST AT 37,000 FT EMERGENCY DECLARED.  DIVERT TO HNLCABIN CLIMBED TO 10,000 DIFF PRES 7 MAX DOWN RATE. OUTFLOW VALVE, CABIN PRESSURE SELECTOR PANEL AND AUTO 1 CABIN PRESSURE CONTROLLER REPLACED. ACCOMPLISHED WORK CARD 19L21021001.

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