# SDR CALA2013090490949

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2013
- Submitted: September 5, 2013
- Operation: Air carrier
- Aircraft: [N221UA](https://openairdocs.org/aircraft/N221UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30552
- Aircraft time: 51,641 hours, 6,396 cycles
- Engine: Pwa PW40903
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Shutoff Valve
- Condition: Malfunctioned
- Location: Nacelle
- Stage of operation: IN
- 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/CALA2013090490949

## Discrepancy

TEST SHOWED MAINTENANCE MESSAGE 75-40732 TURB VANE COOLING AIR VALVE SOL.  THIS ITEM NEEDS TO BE CLEARED TOGETHER WITH DF856.  REPLACED NACELLE ZONE SHUT-OFF VALVE. NEEDS OPERATIONS CHECK.

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