Incident Overview

Date: Monday 18 September 2017
Aircraft Type: de Havilland Canada DHC-8-402Q Dash 8
Owner/operator: WestJet Encore
Registration Number: C-FQWE
Location: 38 nm SW of Calgary International Airport, AB (YYC/CYYC) – ÿ Canada
Phase of Flight: En route
Casualties: Fatalities: 0 / Occupants: 80
Component Affected: Autopilot systemAutopilot system
Category: Accident
A DHC-8-400 aircraft operated by WestJet Encore experienced severe turbulence during descent into Calgary International Airport (CYYC) from Nanaimo, British Columbia (CYCD). The autopilot was disengaged, prompting manual control by the captain. The aircraft returned to a stable flight path after the turbulence subsided, with the captain returning control to the first officer. The flight crew reported the event to ATC and initiated a medical emergency, securing the cabin and briefing passengers on emergency procedures. The aircraft landed safely with EMS assistance, resulting in no passenger injuries and no damage to the aircraft.A DHC-8-400 aircraft operated by WestJet Encore experienced severe turbulence during descent into Calgary International Airport (CYYC) from Nanaimo, British Columbia (CYCD). The autopilot was disengaged, prompting manual control by the captain. The aircraft returned to a stable flight path after the turbulence subsided, with the captain returning control to the first officer. The flight crew reported the event to ATC and initiated a medical emergency, securing the cabin and briefing passengers on emergency procedures. The aircraft landed safely with EMS assistance, resulting in no passenger injuries and no damage to the aircraft.

Description

A DHC-8-400 aircraft operated by WestJet Encore, was conducting flight WEN3304 from Nanaimo, BC (CYCD) to Calgary Intl, AB (CYYC) with 4 crew members and 76 passengers onboard. During the descent into CYYC, WEN3304 experienced severe turbulence approximately 38 nautical miles South West of CYYC at 15 000 feet ASL. The autopilot disengaged which prompted the captain to take control and manually fly the aircraft. Once WEN3304 was back on a stable flight path, the captain returned control to the first officer for the remainder of the flight. The flight crew reported the turbulence event to ATC. The lead flight attendant (FA) contacted the flight deck using the EMERG call switch, informed the flight crew that both FAs had been injured, that the position 2 FA sustained a serious injury and was unable to continue their duties. The flight crew declared a medical emergency and requested priority handling. The lead FA secured the cabin for landing and briefed a passenger on emergency door operation. WEN3304 conducted an uneventful landing and was met by EMS at the gate. There were no passenger injuries and no damage to the aircraft.

Primary Cause

Severe turbulence during descent.Severe turbulence during descent.

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