The helicopter was being used to carry out a check-ride for one of the Captains employed by Capital Aviation Services Ltd. The Check-Captain was authorized by the Licensing Dept. of the Federal Ministry of Transport and Aviation to conduct the test in order that the Captain on check be issued the Bell 206B rating on his Licence as a pilot in command.
After several hovering exercises were carried out within the aerodrome circuit the aircraft proceeded north of the field for the remaining tests in the programme. It was at the tail end of the tests that an engine failure was simulated by the check Captain, but the Captain on check hesitated in his reaction to the required procedure. The report concludes that the accident was probably caused by the failure of the Pilot on the controls to react instant to the engine flame-out by immediately putting the helicopter into auto-rotation.