What was found
AFTER TAKEOFF, DETECTED LOW OIL PRESSURE NR 4 ENGINE. ENGINE SHUTDOWN, FLIGHT RETURNED TO HNL. *S/D* MAIN GEARBOX DE-AERATOR IMPELLER DRIVE FAILED. REPLACED MAIN GEARBOX ASSY.
- Difficulty date
- May 2, 1996
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N155UA
- Make and model
- Boeing 747123
- Aircraft serial
- 20104
- Engine
- Pwa JT9D7A
- System (JASC)
- 7260 · Turbine Engine Accessory Drive
- Part
- Impeller
- Part number
- 769767
- Condition
- Failed
- Location
- Nr 4 Eng Gearbox
- Stage of operation
- CL
- Nature of condition
- J, R
- Precautionary procedure
- A, E
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.