# SDR 2003UALA00527

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 30, 2003
- Submitted: August 6, 2003
- Operation: Air carrier
- Aircraft: N920UA
- Make and model: Boeing 737522
- Aircraft serial: 25387
- Aircraft time: 32,455 hours, 24,254 cycles
- Engine: Ge CFM56*
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 763810
- Part serial: MR21392
- Condition: Failed
- Location: Ee Bay
- Stage of operation: CL
- 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/2003UALA00527

## Discrepancy

AIRCRAFT RETURNED TO THE FIELD WHEN IT WAS UNABLE TO PRESSURIZE AFTER TAKEOFF.  THE CABIN PRESSURE CONTROLLER FAILED.  REPLACED PRESSURE CONTROLLER, TESTED NORMAL.

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