Japan Airlines Passenger Aircraft Parts fall cause is "rupture due to metal fatigue" 12:30 on July 30th
About the trouble that the parts of the engine dropped and the building and the car were damaged immediately after the passenger aircraft of Otoshito Japan Airlines took off from Kumamoto Airport, the Transportation Safety Commission said that the parts inside the engine were broken due to metal fatigue I summarized the report that said.
Otoshito In May, immediately after a JAL passenger plane took off from Kumamoto Airport toward Haneda Airport, numerous metal pieces fell from the engine on the left, causing damage to surrounding buildings and cars. The passenger plane returned to the airport and the passengers and crew were not injured.
According to a survey report compiled by the Transport Safety Commission, one of the metal blades called "turbine blades" that rotate at high speed inside the engine broke, causing the surrounding parts to break and fall. However, it is said that the collected pieces were about 400 pieces and the heavy pieces were about 70 grams.
In addition, we conclude that the cause of the turbine blade rupture is that the crack progressed from the surface due to metal fatigue.
As a measure to prevent the recurrence of this trouble, Japan Airlines will replace the same type of blade used in other engines with a new blade, and the engine manufacturer will call on airlines to replace parts. ..