# SDR UALA2012101005773

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2012
- Submitted: October 31, 2012
- Operation: Air carrier
- Aircraft: N548UA
- Make and model: Boeing 757222
- Aircraft serial: 25396
- Aircraft time: 78,613 hours, 22,728 cycles
- Engine: Pwa PW2037
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Circuit Card
- Part number: 285N000612
- Part serial: D00894
- Condition: Failed
- Location: Bleed Sys
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012101005773

## Discrepancy

BOTH PRSOV VALVES FAILED TO CLOSED.  PERFORMED TEST.   REPLACED NR 1 AND NR 2 ECS BLEED CARDS.

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