# SDR 2008UALA04389

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2008
- Submitted: August 26, 2008
- Operation: Air carrier
- Aircraft: [N664UA](https://openairdocs.org/aircraft/N664UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29236
- Aircraft time: 35,343 hours, 10,010 cycles
- Engine: Pwa PW4056
- System (JASC): [7921 · Engine Oil Cooler](https://openairdocs.org/jasc/7921)
- Part: Bypass Valve
- Part number: 2810193111
- Condition: Leaking
- Location: Eng Oil Cooler
- Stage of operation: NR
- How discovered: O
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA04389

## Discrepancy

OIL LEAKAGE FROM LT ENG OIL COOLER BYPASS VALVE.  FOUND LEAK FOUND COMING FROM AIR-OIL HEAT EXCHANGER VALVE. REPLACED NR 1 ENG AIR OIL HEAT EXCHANGER. NO LEAKS ON GROUND TEST. 


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