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Last updated: 4 December 2021
Date:Saturday 2 September 1978
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 200
Operator:Airwest Airlines
Registration: C-FAIV
MSN: 215
First flight: 1969
Engines: 2 Pratt & Whitney Canada PT6A-20
Crew:Fatalities: 2 / Occupants: 2
Passengers:Fatalities: 9 / Occupants: 11
Total:Fatalities: 11 / Occupants: 13
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:Vancouver-Coal Harbour SPB, BC (CXH) (   Canada)
Phase: Approach (APR)
Nature:Domestic Scheduled Passenger
Departure airport:Victoria Harbour, BC, Canada
Destination airport:Vancouver-Coal Harbour SPB, BC (CXH/CYHC), Canada
The float-equipped Twin Otter passenger plane departed Victoria Harbour at 17:18 for a 20-minute flight to Vancouver Harbour water aerodrome (CXH). At 175 feet, while on final approach, a loud noise was heard. The aircraft yawed to the left and plunged into the harbour in a left-wing and nose-down attitude, 2500 feet short of the landing area.

Probable Cause:

PROBABLE CAUSE: In-flight failure of the left-hand inboard flap control rod that led to a sudden retraction of the complete left-hand flap system and sudden loss of control. The inboard span-wise push-pull flap control rod (inboard bell-crank to inboard rod) was severely stress-corroded and had at least three longitudinal cracks; the rod had separated from its inboard fitting.

Issue with flap(s)
Loss of control

» CASB Final Report
» ICAO Circular 166-AN/105 (101-115)


photo of DHC-6-Twin-Otter-200-C-FAIV
accident date: 02-09-1978
type: de Havilland Canada DHC-6 Twin Otter 200
registration: C-FAIV
languages: languages