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ASN Wikibase Occurrence # 194176
Last updated: 9 February 2021
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Time:10:59 LT
Type:Silhouette image of generic AS50 model; specific model in this crash may look slightly different
Eurocopter AS 350B3 Écureuil
Owner/operator:Hirata Gakuen of Education Fundation
Registration: JA500H
C/n / msn: 7488
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Kobe Airport (UKB/RJBE) -   Japan
Phase: Landing
Departure airport:Kobe Airport (UKB/RJBE)
Destination airport:Kobe Airport (UKB/RJBE)
Investigating agency: JTSB
A Eurocopter AS 350B3 of Hirata Gakuen crashed and lay on its right side at the grass area for helicopter training, south of the sole runway 09/27, at Kobe Airport. Two onboard received minor injuries. The Écureuil was on an annual training flight, and have performed some touch-and-go. When the training was finished, Kobe Tower asked to the helicopter to move from the landed grass area not to be an obstacle for commercial jet flights. While moving from the grass area, the balance of the AS350 was lost, and the accident was happened. The runway was closed for a half hour, however, no commercial flight was affected.
The weather data at Kobe Airport (0200 UTC/1100 LT):
RJBE 140200Z 35015KT 9999 FEW035 SCT140 BKN/// 11/01 Q1011

It is probable that this accident occurred because, when control was transferred from the pilot in the right seat to the PIC in the left seat immediately after the Helicopter made a running landing in hydraulic system failure training and the Helicopter attempted to lift off again, left rotation occurred and the Helicopter rolled over to the right due to dynamic rollover in which the trailing end of the right skid, which became stuck in the ground, served as the fulcrum, causing damage to the Helicopter.
Regarding the left rotation, it is probable that this occurred because the collective pitch lever rose after the transfer of control and appropriate control in response to it did not take place.
It is probable that the fact that an operation to restore hydraulic pressure was being conducted simultaneously with the transfer of control and the fact that the collective pitch lever was not being held appropriately contributed to the collective pitch lever’s rise.


Accident investigation:
Investigating agency: JTSB
Status: Investigation completed
Duration: 1 year and 8 months
Download report: Final report

Revision history:

14-Mar-2017 07:22 isamuel Added
14-Mar-2017 11:22 Aerossurance Updated [Aircraft type, Narrative]
14-Mar-2017 14:54 Iceman 29 Updated [Embed code]
14-Mar-2017 16:25 isamuel Updated [Source, Narrative]
02-Dec-2018 20:44 harro Updated [Time, Phase, Source, Embed code, Narrative, Accident report, ]

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