Investigation Summary
The flight departed London-Northolt at 19:09 BST for a scheduled short-haul service to Glasgow, carrying 16 passengers and 4 crew members. After approximately one hour of flight, the crew was cleared for a standard beam approach into Renfrew. During the descent, the crew attempted to confirm the status of the outer marker beacon, which was their last recorded radio transmission. The aircraft subsequently struck the hillside of Irish Law Mountain nose-first. The force of the impact caused the fuselage to break into three distinct parts and separated the engines and the left wing. A fire broke out shortly after the crash, but the crew and passengers managed to evacuate the wreckage. While 13 individuals sustained injuries, there were no fatalities. Significant portions of the airframe, including the engines and landing gear, were left at the site and remain visible on the mountain today.
Final Conclusions
The official investigation concluded that the primary cause was pilot error. A significant contributory factor was the failure of the crew to receive the outer marker beacon signal, which was likely caused by a fault that had developed in the aircraft's beacon receiver during the flight.
Photographic Evidence (1)
Video Analysis
No video analysis linked for this case file yet.
Systems & Failure Modes
Outer Marker Beacon Receiver
A radio receiver designed to alert the crew when passing over a specific geographic point during an instrument approach; a fault in this system prevented the crew from receiving the necessary signal.
Standard Beam Approach (SBA)
A blind-landing system used in the 1940s that provided lateral guidance to pilots via radio signals.
Interesting Facts
- 01All 20 passengers and crew survived the crash and subsequent fire.
- 02Thirteen individuals sustained injuries in the accident.
- 03The aircraft was a Vickers 610 Viking 1B named 'Vestal'.
- 04The wreckage was left in situ on Irish Law Mountain and remains a known hiking landmark.
- 05The crash occurred during a standard beam approach in instrument conditions.