# SDR 97UAL900550

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N774UA](https://openairdocs.org/aircraft/N774UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26936
- Engine: Pwa PW4077
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Prox Switch
- Part number: 8085772
- Condition: Sticking
- Location: Rt Pack
- Component: Hamilton Sta, 8102042
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900550

## Discrepancy

CREW REPORTS, LOUD AIR NOISE IN RIGHT SIDE OF CABIN ROW 15.  AIR SYNOPTIC SHOWS RIGHT PACK WITH NO FLOW.  RIGHT DUCT PRESSURE NORMAL.  AIRCRAFT RETURN TO ORD (ORD-LHR).  *S/D*  SUSPECT NO FLOW INDICATION ON SYNOPTIC PAGE RESULT OF STICKING FLOW CONTROL VALVE (PN 810204-2) PROXIMITY SWITCH (PN 808577-2).  ALSO, REPLACED CABIN TEMPERATURE CONTROLLER PRECAUTIONARY.

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