On 3 June 1966, a newly built Hawker Siddeley Trident jetliner crashed during a pre-delivery test flight near the village of Felthorpe, Norfolk, England, killing all four crew.

[1] The aircraft involved was a tri-jet Hawker Siddeley Trident 1C, registration G-ARPY,[2] that was about to be delivered to British European Airways.

[3] The crew were pilots Peter Barlow and George Errington, and technicians E. Brackstone-Brown and G.W.

Although full power was applied, the aircraft entered into a flat spin, and crashed at Felthorpe, killing all on board.

The investigation found that accident was the result of the pilot delaying recovery manoeuvres for too long, thereby allowing the aircraft to enter a deep stall from which it was impossible to recover.