# SDR DALA2019062403776

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2019
- Submitted: June 24, 2019
- Operation: Air carrier
- Aircraft: [N658DL](https://openairdocs.org/aircraft/N658DL), registered now
- Make and model: Boeing 757232
- Aircraft serial: 24420
- Aircraft time: 88,165 hours, 40,181 cycles
- Engine: Pwa PW2037
- System (JASC): [7933 · Engine Oil Temperature](https://openairdocs.org/jasc/7933)
- Part: Bypass Valve
- Condition: Malfunctioned
- Location: Lt Engine
- 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/DALA2019062403776

## Discrepancy

CREW PERFORMED DIVERSION DUE TO LEFT ENGINE OIL TEMP HIGH. REPLACED THE AIR/OIL HEAT EXCHANGER, FUEL/OIL COOLER, BYPASS VALVE AND OIL TEMP THERMOCOUPLE. OIL TEMPS NORMAL DURING HIGH POWER RUNS AND AIRCRAFT RETURNED TO SERVICE.

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