United B763 over Atlantic on Mar 28th 2022, engine failure
Last Update: May 8, 2024 / 12:47:21 GMT/Zulu time
Incident Facts
Date of incident
Mar 28, 2022
Classification
Incident
Cause
Engine failure
Airline
United
Flight number
UA-134
Departure
Newark, United States
Destination
Zurich, Switzerland
Aircraft Registration
N675UA
Aircraft Type
Boeing 767-300
ICAO Type Designator
B763
The Irish AAIU reported that a fan blade separated from the right hand engine, the aircraft also suffered damage to the right hand elevator with fragments of the fan blade being embedded in the elevator.
On May 8th 2024 the AAIU released their final factual report without conclusions but stating:
The Engine Manufacturer considered that the most likely sequence of events was:
1. No.1 Bearing distress caused by spalling in the outer, and likely spalling in the inner race (the exact cause of the spalling could not be determined).
2. No.1 oil supply tube fractured in high cycle fatigue, due to vibration in its first fundamental frequency range.
3. Inadequate lubrication to No. 1 bearing caused by No. 1 oil supply tube fracture.
4. No. 1 Bearing oil starvation and overheating, leading to raceway and ball wear.
5. Aft axial shift of low-pressure shaft causing rotor clashing.
6. Multiple engine surges.
7. Impact of released turbine blade on horizontal stabiliser.
8. Engine in-flight shutdown actioned by the Flight Crew.
Aircraft Registration Data
Incident Facts
Date of incident
Mar 28, 2022
Classification
Incident
Cause
Engine failure
Airline
United
Flight number
UA-134
Departure
Newark, United States
Destination
Zurich, Switzerland
Aircraft Registration
N675UA
Aircraft Type
Boeing 767-300
ICAO Type Designator
B763
This article is published under license from Avherald.com. © of text by Avherald.com.
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