# SDR UALA2013072305176

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2013
- Submitted: July 25, 2013
- Operation: Air carrier
- Aircraft: [N204UA](https://openairdocs.org/aircraft/N204UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 28713
- Aircraft time: 64,918 hours, 9,013 cycles
- Engine: Pwa PW4090
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Actuator
- Part number: 54H217
- Part serial: 132
- Condition: Faulty
- Location: Turbine Cooling
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013072305176

## Discrepancy

LT ENGINE HIGH PRESSURE TURBINE CASE COOLING ACTUATOR IS STUCK OR REVERTED TO ITS FAIL-SAFE POSITION.   REPLACED TCC AIR VALVE ACTUATOR IAW AMM.  PERFORMED TCC VALVE ACTUATOR TEST NR 3 & NR 6 IAW AMM 71-00-00.  ACCOMPLISHED TCC SYS INSPECTION CHECK IAW AMM 75-24-00.  GROUND CHECKED GOOD.

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