CH147F306 Chinook - From the Investigator

Report / June 11, 2021 / Project number: CH147F306 - B Category

Location: Wainwright, AB
Date: 11 May 2021
Status: Investigation Ongoing

On the day of the accident, a CH147F Chinook helicopter was conducting a series of familiarization flights with various Military personnel onboard as a wrap up to Exercise Maple Resolve. The Chinook was flying in concert with two CH146 Griffons in VMC (Visual Meteorological Conditions).

Each sortie involved landing sequences to unprepared surfaces out in the assigned training area. On the third sortie of the mission, with 12 passengers and 5 crew onboard, the Chinook attempted a landing to a selected spot in a grassy field. Very shortly after touch down, due to concerning perceptions of drift, the Flight Engineer (FE) called for the pilot to abort the landing with the command “Up, Up, Up.” The pilot flying (PF) aborted the landing and started to climb the aircraft into a hover. The aircraft entered into an unstable flight regime shortly after with strong lateral oscillations causing the PF to initiate an emergency landing. Upon touch down, the FE called for an emergency egress whilst the PF initiated an emergency shutdown of the aircraft. Two of the front rotor blades made contact with the fuselage and the rear landing gear collapsed.

The aircraft sustained very serious damage. Of the personnel onboard, 3 reported minor injuries following the accident.

The investigation is focusing on material and human factors.

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