Service difficulty report · Scavenge Pump · Boeing 737823

Difficulty date
December 18, 2025
Submitted
January 6, 2026
Operation
Air carrier
Aircraft
N301NW
Make and model
Boeing 737823
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

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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).