# SDR DALA2015072404591

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 23, 2015
- Submitted: July 24, 2015
- Operation: Air carrier
- Aircraft: [N665US](https://openairdocs.org/aircraft/N665US), registered now
- Make and model: Boeing 747451
- Aircraft serial: 23820
- Aircraft time: 108,522 hours, 13,444 cycles
- Engine: Pwa PW4056
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Carbon Seal
- Condition: Leaking
- Location: Nr 2 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2015072404591

## Discrepancy

NR 2 ENGINE INFLIGHT SHUTDOWN DUE TO LOW OIL PRESSURE.  MAINTENANCE PERFORMED NR 2 ENGINE GEARBOX PRESSURE CHECK, FOUND IDG CARBON SEAL LEAKING.  MAINTENANCE REPLACED IDG CARBON SEAL, COMPLIED WITH LEAK CHECK AND NO LEAKS NOTED.

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