The mysterious circumstances that led a glider to crash at a Norfolk airfield remain unresolved despite a thorough investigation.

The aircraft, a two-seater Pegasus Quik, was being piloted by a trainee and an instructor when it veered off the edge of the runway at Northrepps Aerodrome and tumbled onto its side.

According to a report from the Air Accident Investigation Branch (AAIB), the weather was clear with little wind at the time of the crash, at just after 7am on September 30 last year.

Eastern Daily Press: A trainee and an instructor were piloting the two-seater Pegasus Quik when the crash happenedA trainee and an instructor were piloting the two-seater Pegasus Quik when the crash happened (Image: Creative Commons)

The instructor claims that as the craft gathered speed to take off, the trainee applied the brakes which caused it to suddenly head right toward the side of the runway. 

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But the trainee, who had only five hours of flying experience at the time, insists he did not touch the brake. 

Eastern Daily Press: The crash took place at Northrepps Aerodrome last SeptemberThe crash took place at Northrepps Aerodrome last September (Image: Newsquest)

As the aircraft headed toward the long grass, both pilots attempted to steer it back on course but could not. 

It skidded through the grass before toppling over and coming to a stop, during which the 65-year-old instructor broke his wrist. 

Due to the conflicting reports of both pilots, the true cause of the crash is "unresolved".