Accident Bristol 170 Freighter 21 G-AHJJ, Tuesday 21 March 1950
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Date:Tuesday 21 March 1950
Time:
Type:Silhouette image of generic B170 model; specific model in this crash may look slightly different    
Bristol 170 Freighter 21
Owner/operator:Bristol Aeroplane Company
Registration: G-AHJJ
MSN: 12742
Year of manufacture:1946
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Destroyed, written off
Category:Accident
Location:near Cowbridge -   United Kingdom
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Test
Departure airport:Filton Airport (FZO/EGTG)
Destination airport:Filton Airport (FZO/EGTG)
Narrative:
Bristol 170 Freighter 21 had just been converted from Mk. 2A to Mk. 21 and was on its second test flight for the Certificate of Airworthiness renewal. Some 34 minutes past departure the aircraft entered a spin, crashing out of control.

PROBABLE CAUSE: "The accident is a result of a structural failure of the fuselage stern frame to which the fin is attached and must be attributed to the application on the fin and rudder of a load greater than the design ultimate load. Calculations suggest that the cause of this overloading was excessive rudder movement at a speed greater than 120 knots EAS."

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