# SDR 98UAL900428

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7443U
- Make and model: Boeing 727222
- Aircraft serial: 21897
- Engine: Pwa JT8D15
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Seal
- Part number: 10614501
- Condition: Missing
- Location: Outflow Vlv
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900428

## Discrepancy

UNABLE TO MAINTAIN CABIN PRESSURE IN EITHER AUTO, STANDBY, OR MANUAL.  DESCENDED TO 10,000 FEET AND PROCEEDED TO CLE.  *S/D*  MAINTENANCE FOUND OUTFLOW VALVE SEAL MISSING.  ALSO, FOUND THE SEAL ON DOOR 1 RIGHT OUT OF TRACK.  REPOSITIONED SEAL ON DOOR TRACK AND INSTALLED SEAL ON OUTFLOW VALVE.

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