What was found
NR 1 ENGINE VIBRATION ENCOUNTERED AT 35,000 FEET AND WAS FOLLOWED SOON AFTER BY AN OIL FILTER BYPASS LIGHT AND FLUCTUATING FUEL FLOW. *S/D* ENGINE WAS REMOVED. ENGINE DISASSEMBLY REVEALED A NUMBER 4 BEARING FAILURE.
- Difficulty date
- August 20, 1997
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N396UA
- Make and model
- Boeing 737322
- Aircraft serial
- 24671
- Engine
- Ge CFM56*
- System (JASC)
- 7250 · Turbine Section
- Part
- Bearing
- Part number
- 3053556220
- Condition
- Failed
- Location
- Nr 1 Engine
- Part time
- 15,536 hours
- Stage of operation
- CR
- Nature of condition
- E, J
- Precautionary procedure
- E, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.