# SDR 2026F00138

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2026
- Submitted: July 2, 2026
- Operation: General aviation
- Aircraft: [N652UA](https://openairdocs.org/aircraft/N652UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 25390
- Engine: Pwa PW4060
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Carbon Seal
- Condition: Leaking
- Location: Nr 2 Engine
- Component: Stator
- Component part number: 4300702
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00138

## Discrepancy

DURING CRUISE THE A/C FACE RT OIL PRESSURE LT INTERMITTENT ILLUMINATION AND RT ENG QTY INDICATION 0. OIL PRESS FLUCTUATES DOWN 1 TO 27 TEMP NORMAL.  CREW REPORTED THAT APPROXIMATELY TWO HOURS PRIOR TO ARRIVAL, INTERMITTENT ENG2 OIL PRESSURE WARNING INDICATIONS WERE OBSERVED, ACCOMPANIED BY LOW AND FLUCTUATING OIL LEVEL. ENG2 OIL SERVICING CARRIED OUT, 18 CANS OF OIL WERE USED. VISUAL INSPECTION OF THE ENGINE C/OUT WITH NO OBVIOUS OIL LEAKS INITIALLY IDENTIFIED. ENG2 DRAIN MAST CONNECTIONS REMOVED AND PLASTIC BAGS INSTALLED TO ASSIST IN LOCALIZING A POTENTIAL OIL LEAK. EGR PERFORMED. OIL LEAK IDENTIFIED ORIGINATING FROM THE PMA CARBON FIBRE SEAL ON ENG2. TOMC INFORMED, AND AIRCRAFT DECLARED AOG. NO SPARE PARTS OR REQUIRED TOOLING AVAILABLE30.06.  FIELD TEAM ARRIVED - READY TO REMOVE CARBON FIBRE FROM PMA.   CONTINUED TO REMOVE THE SPACER ON THE SHAFT, RE-INSTALLATION OF THE SPACER INSIDE OF THE GEARBOX & PMA 01.07 ALL ACCESSES REINSTALLED AND ENGINE COWLS CLOSED. EGR TEST AND LEAK CHECK PERFORMED SATISFACTORY. NO LEAK. EPDSC PERFORMED.  AIRCRAFT READY FOR DEPARTURE.

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