# SDR UALA2012102906231

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 28, 2012
- Submitted: November 21, 2012
- Operation: Air carrier
- Aircraft: [N773UA](https://openairdocs.org/aircraft/N773UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26929
- Aircraft time: 70,198 hours, 13,365 cycles
- Engine: Pwa PW4077
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Control Valve
- Part number: S351W200100
- Part serial: 037
- Condition: Faulty
- Location: Apu
- Stage of operation: NR
- 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/UALA2012102906231

## Discrepancy

APU BLEED AIR STATUS MSG.  APU BLEED AIR INOP, APU AIR SWITCH POSITIONED OFF, PLACARDS APPLIED, FWD TO DF MCC INFORMED. -RDF-T :REPLACED APU CONTROLLER PER AMM, NO HELP. INF-  :MR49622-37 OFF.MR49622-32 ON.  REPLACED SURGE CONTROL VALVE OPS CK'D NORMAL.

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