Qualla: 1986 British International Helicopters Chinook Crash

1986 British International Helicopters Chinook Crash: Introduction

Sat, 14 Mar 2026 00:00:00 GMT

The voice recorder captured an increased noise level in the cockpit, then a bang. Captain Pushp Vaid applied full cyclic pitch control, but the Chinook did not respond. From a height of 150 feet, the helicopter fell toward the North Sea. Its twin rotors, no longer synchronised, had collided -- the blades tearing through each other and ripping the aircraft apart in mid-air before it hit the water and sank. On 6 November 1986, forty-three passengers and two crew members died 2.5 miles from the runway at Sumburgh Airport in Shetland. Only two people survived. It was the worst helicopter disaster in the world at that time.

1986 British International Helicopters Chinook Crash: The Brent Shuttle

Sat, 14 Mar 2026 00:00:00 GMT

The Boeing-Vertol Model 234LR Chinook was normally based at Aberdeen Airport but had been operating from Sumburgh since 3 November to run a shuttle service to the Brent oilfield in the East Shetland Basin. On the morning of the crash, the first flight had been delayed by an oil l...

1986 British International Helicopters Chinook Crash: Two Minutes of Horror

Sat, 14 Mar 2026 00:00:00 GMT

A catastrophic failure of a modified bevel ring gear in the forward transmission allowed the tandem rotors to lose synchronisation. When spinning rotor blades collide, the destruction is instantaneous and total. The helicopter was largely broken apart in mid-air, then struck the ...

1986 British International Helicopters Chinook Crash: Recovery from the Deep

Sat, 14 Mar 2026 00:00:00 GMT

The wreckage lay in roughly 90 metres of water with strong tidal currents and building seas. The diving support vessel Deepwater 1 began the search the following morning but struggled to hold position. Shell Expro's semi-submersible Stadive took over as primary recovery vessel an...

1986 British International Helicopters Chinook Crash: A Legacy Written in Safety Rules

Sat, 14 Mar 2026 00:00:00 GMT

The AAIB made three principal recommendations: that certification procedures for modifications to vital components be strengthened, that condition monitoring systems for helicopters be improved, and that emergency beacon equipment be redesigned to survive high-impact crashes. The...