# SDR UALA2011032101362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2011
- Submitted: March 24, 2011
- Operation: Air carrier
- Aircraft: [N648UA](https://openairdocs.org/aircraft/N648UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25285
- Aircraft time: 78,777 hours, 12,690 cycles
- Engine: Pwa PW4060
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 7732887810
- Part serial: 26
- Condition: Faulty
- Location: Bleed Air Sy
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011032101362

## Discrepancy

L DUCT PRESS FLUX.  L DUCT PRESS CYCLING DURING DESCENT.  VALVE LOCKED CLOSED. WORK WITH CH1548. 1 EA RELAY 562-1833 SHPD AOM D0403.  REPLACED PRSOV PER MM.  ACP ENGINE RUN, OPS CHECK NORMAL.

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