# SDR DALA2019060403405

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 2, 2019
- Submitted: June 5, 2019
- Operation: Air carrier
- Aircraft: [N547US](https://openairdocs.org/aircraft/N547US), registered now
- Make and model: Boeing 757251
- Aircraft serial: 26494
- Aircraft time: 72,869 hours, 24,018 cycles
- System (JASC): [7720 · Engine Temperature Indicating System](https://openairdocs.org/jasc/7720)
- Part: Sensor
- Condition: Unknown
- Location: Engine Temp
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2019060403405

## Discrepancy

ATB- BEFORE ENTERING THE ETOPS TRACK THE CREW NOTICED THE LT ENGINE BLEED TEMP RISE TO 490 WITH THE ENG A/I ON. RETURNED TO DEPARTURE.   R/R L/T ENG OVERTEMP SENSOR PER AMM 36-11 ALSO R & R LT ENG NORMAL TEMP SENSOR PER AMM 36-11. R & R L/T ENGINE FAMV PER AMM 36-11.  REPLACED PRV & PILOT VALVE.  REPLACED FAN AIR TEMP SENSOR. REPLACED OVER TEMP LIMIT SENSOR. REPLACED AIR SUPPLY THERMAL OVER TEMP SWITCH AMM 36-22 AND PRECOOLER DISC TEMP SENSOR IAW AMM 36-22. RAN BOTH ENGINES, BLEED CK OK, BLEED SHIFT CK OK.

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