# SDR AALA202601063655

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2025
- Submitted: January 6, 2026
- Operation: Air carrier
- Aircraft: [N301NW](https://openairdocs.org/aircraft/N301NW), registered now
- Make and model: Boeing 737823
- System (JASC): [7921 · Engine Oil Cooler](https://openairdocs.org/jasc/7921)
- Part: Scavenge Pump
- Condition: Leaking
- Location: Zone 400
- Stage of operation: CR
- How discovered: V
- Nature of condition: J, K, S
- Precautionary procedure: A, E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202601063655

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CRUISE NEAR TOP OF DECENT AT FL210, #1 ENGINE OIL QUANTITY INDICATED 0, SHUTDOWN NUMBER 1 ENGINE. AIRCRAFT EMERGENCY LANDED SAFELY AT OMA. **SUPPLEMENTAL REPORT FOR (AALA202512196384) SUBMITTED 12/19/2025 BY DFW: FOUND ENGINE NUMBER 1 LUBRICATION UNIT LEAKING FROM AGB TUBE (OIL SCAV). TUBE BOLT THREDS/INSERT PULLING OUT OF UNIT ASSY CAUSING LEAK. REMOVE AND REPLACED ENGINE NUMBER 1 LUBRICATION UNIT (AALA202512196384) AND AGB TUBE (OIL SCAVENGER) (AALA202601063655). PER AMM 79-21-01. LEAK CHECK GOOD**(CLOSED).

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