# SDR 2007UALA01873

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 6, 2007
- Submitted: June 14, 2007
- Operation: Air carrier
- Aircraft: [N642UA](https://openairdocs.org/aircraft/N642UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25092
- Aircraft time: 69,598 hours, 11,303 cycles
- Engine: Pwa PW4060
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Fuel
- Condition: Leaking
- Location: Rt Engine
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007UALA01873

## Discrepancy

NOTICED DURING WALKAROUND INSPECTION RUNNING FUEL LEAK OUT OF UPPER PYLON AREA ON RIGHT ENGINE.   [07-31-07]   FOUND O-RING ON COUPLING "AS" REF IPC 28-22-07 PAGE17 SPLIT IN TWO PIECES. PACKING WAS WRO INSTALLED REF IPC.FOUND O-RING BETWEEN COUPLING NUT AND ONE RETAINING RING INSTALLED INSTEAD OF IN BETWEEN BOTH RETAINING RINGS. REPLACED PN:MS29513-330 AT FRONT SPAR MAIN FEED LINE COUPLING. LEAK CHECK SATIS.  SUSPECT HEAT/COLD CYCLE, VIBRATION & SUBSEQUENT TIGHTENING CAUSED O-RING TO SPLIT.

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