ASN Wikibase Occurrence # 161681
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Narrative:A Boeing 767-300, registered JA8674, operated by All Nippon Airways took off from Tokyo International Airport for Toyama Airport as a scheduled Flight 883 at 09:08 JST .
|Owner/operator:||All Nippon Airways - ANA|
|Fatalities:||Fatalities: 0 / Occupants: |
|Aircraft damage:|| Minor|
|Location:||79 km NW of Tokyo-Haneda Airport (HND/RJTT) -
|Phase:|| En route|
|Nature:||Passenger - Scheduled|
|Departure airport:||Tokyo-Haneda Airport (HND/RJTT)|
|Destination airport:||Toyama Airport (TOY/RJNT)|
|Investigating agency: ||JTSB|
|Confidence Rating:|| Accident investigation report completed and information captured|
At 09:19 while flying at an altitude of approximately 8,500m, a loud noise accompanied by vibration was heard from No.1 Engine (the left
engine; hereinafter referred to as “the Engine”); therefore, the flight crew they shut it down and returned to Tokyo International Airport. The Aircraft made an uneventful landing at the airport at 09:51 after obtaining a priority in the air traffic control.
It is highly probable that this serious incident was caused by the separation of a second stage HPT blade via fatigue mechanisms during service, followed by the liberated blade fragment in the shank (post-separation) resulted in secondary downstream impact damage for entire axial length of the LTP.
The possible contributing factor to the fatigue propagation was increase in stress because of the reduction in wall thickness caused by excessive grit blasting during the last repair
| || |
|Investigating agency: ||JTSB |
|Status: ||Investigation completed|
|Download report: || Final report|
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