# SDR SWAA980121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N82SW
- Make and model: Boeing 737-2H4
- Registry model: [Boeing 737-2H4](https://openairdocs.org/model/boeing-737-2h4) (OpenAirDocs)
- Aircraft serial: 22731
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Relay
- Part number: 655281025
- Condition: Inop
- Location: E/E Compt
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA980121

## Discrepancy

AFTER TAKEOFF, UNABLE TO PRESSURIZE THE AIRCRAFT IN AUTO, STANDBY OR MANUAL MODES.  REPLACED A/C RELAY UNIT PER BOEING MM.

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