Old 28th Apr 2017, 11:37
  #1768 (permalink)  
FNTC
 
Join Date: May 2016
Location: Stavanger
Posts: 13
New preliminary report out today.

https://www.aibn.no/Aviation/Investigations/16-286

"The observed failure mode in this accident, i.e. crack initiation and propagation with limited spalling, seems to differ from what was expected or foreseen during the design and certification of the main rotor gearbox. The fracture propagated in a manner which was unlikely to be detected by the maintenance procedures and the monitoring systems fitted to LN-OJF at the time of the accident."

Last edited by FNTC; 28th Apr 2017 at 11:54.
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