# SDR UALA2011030401059

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 3, 2011
- Submitted: March 4, 2011
- Operation: Air carrier
- Aircraft: [N783UA](https://openairdocs.org/aircraft/N783UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26950
- Aircraft time: 62,101 hours, 8,937 cycles
- Engine: Pwa PW40903
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Shutoff Valve
- Part number: 16P944
- Condition: Unserviceable
- Location: Nr 2 Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011030401059

## Discrepancy

NR 2 ENGINE OB TVBC INDICATOR PIN MISSING.  NR 2 ENGINE OB TVBC VALVE INDICATOR PIN MISSING.  REMOVED OB TVBC AIR SHUTOFF VALVE.  REPLACED TVBC VALVE PER MM, OPS CHECK GOOD.

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