# SDR CALA2013101792145

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 16, 2013
- Submitted: October 22, 2013
- Operation: Air carrier
- Aircraft: [N222UA](https://openairdocs.org/aircraft/N222UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30553
- Aircraft time: 52,563 hours, 6,311 cycles
- Engine: Pwa PW40903
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Condition: Malfunctioned
- Location: Bleed Air Sys
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2013101792145

## Discrepancy

BLEED PRSOV LEFT MESSAGE DUE TO CHRONIC BLEED PRSOV LEFT MESSAGES, PLEASE PERFORM A PNEUMATIC SYSTEM HEALTH CHECK IAW SERVICE TIP 36-UA1 FOR PRSOV MUSCLE LINE FROM PRSOV TO PRSOV CONT.  R & R PRSOV IAW AMM 36-11-09.  ALSO, REPLACED PRSOV CONTROLLER IAW 36-11-18-401 PRECAUTIONARY.

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