# SDR TWAA9800101

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 1, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N957U
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49702
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21171802
- Condition: Failed
- Location: Cabin
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA9800101

## Discrepancy

IAD - FLT 123 - DURING CRUISE AT 27,000 FT, LOST PRIMARY AND SECONDARY PRESSURIZATION CONTROL  REMOVED AND REPLACED NR 1 PRESS CONTROL, MFG NR 2117180-2.  (M)

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