# SDR FDEA202603110334

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2026
- Submitted: March 11, 2026
- Operation: Air carrier
- Aircraft: [N986FD](https://openairdocs.org/aircraft/N986FD), registered now
- Make and model: Boeing 757231
- Aircraft serial: 28482
- Aircraft time: 47,242 hours, 20,205 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Seal
- Part number: ST1946145
- Condition: Leaking
- Location: De Oiler
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202603110334

## Discrepancy

OPEN  DIRTY SOCK ODOR OCCURRED INTERMITTENTLY AT CRUISE  AND INTENSIFIED ON DESCENT.  WE ACCOMPLISHED THE  SMOKE AND FUME ELIMINATION CHECKLIST.  EMERGENCY DECLARED.  AMM 72-61-10-4, AMM 21-00-01-2, FOUND OIL AT FLIGHT IDLE ON LT ENG RUNNING FROM DRAIN MAST WHICH CONNECTS TO DE-OILER HOUSING. R & R ROTATING RING ASSY PACKINGS ON DE-OILER HOUSING.  ALL OPS CHECKS ARE GOOD, RAN ENGINE UP TO TAKE OFF POWER.  IAW MM 72-61-10-4, MM 21-00-01-2, AT ALL POWER SETTINGS, NO DIRTY SOCK ODOR NOTED

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