# SDR UALA2013032001708

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 19, 2013
- Submitted: April 16, 2013
- Operation: Air carrier
- Aircraft: [N220UA](https://openairdocs.org/aircraft/N220UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30223
- Aircraft time: 50,036 hours, 6,112 cycles
- Engine: Pwa PW40903
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Actuator
- Part number: 54H217
- Part serial: 89
- Condition: Failed
- Location: Turbine Cooling
- Stage of operation: TX
- 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/UALA2013032001708

## Discrepancy

LEFT ENGINE HIGH PRESSURE TURBINE CASE COOLING ACTUATOR IS STUCK OR REVERTED TO ITS FAIL/SAFE POSITION.  REPLACED NR 1 ENGINE TCC ACTUATOR. RECONNECTED AND RIGGED TCC CONTROL. REPINNED CONNECTOR DM75004 TO NORMAL POSITION. PASSED GROUND TEST 15 AND 3.

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