Final Report: Helicopter encountered ground resonance

Aviation International News » January 2007
December 18, 2006, 9:01 AM

Aerospatiale SA 319B, Escalante, Utah, Dec. 14, 2005–The NTSB said the probable cause of the SA 319 accident was the pilot’s inadequate remedial action when the helicopter entered ground resonance. The rough/uneven terrain and inadequate company maintenance were contributing factors.

The pilot of the 30-year-old helicopter touched down on a sloping rock outcrop and the aircraft began to oscillate. He said he pulled up on the collective, and then the helicopter “suddenly self-destructed.” One rotor blade hit the cabin and injured a passenger.

Investigators identified a number of maintenance discrepancies, including improper tire inflations, improper main landing gear hydraulic shock strut pressures and differential functioning of the main rotor blade drag dampers.

Share this...

Please Register

In order to leave comments you will now need to be a registered user. This change in policy is to protect our site from an increased number of spam comments. Additionally, in the near future you will be able to better manage your AIN subscriptions via this registration system. If you already have an account, click here to log in. Otherwise, click here to register.