Incident Overview

Date: Thursday 17 January 1963
Aircraft Type: Scottish Aviation Twin Pioneer 1
Owner/operator: Bristow Helicopters
Registration Number: G-APLN
Location: 22 km off Chepbeica – ÿ Morocco
Phase of Flight: En route
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 3
Component Affected: Aircraft Flight Control SystemAircraft Flight Control System
Category: Accident
On Twin Pioneer, an aircraft encountered severe turbulence and depression during a ferry flight to Dakar. Due to radio failures and a lack of navigational beacons, the captain made the decision to land near a fishing vessel. Subsequently, it was discovered that the Fuerteventura NDB was not operational at the requested time, and the Flight Plan was received before the aircraft departed Marrakech.On Twin Pioneer, an aircraft encountered severe turbulence and depression during a ferry flight to Dakar. Due to radio failures and a lack of navigational beacons, the captain made the decision to land near a fishing vessel. Subsequently, it was discovered that the Fuerteventura NDB was not operational at the requested time, and the Flight Plan was received before the aircraft departed Marrakech.

Description

The Twin Pioneer departed Southend on a ferry flight to Dakar. Intermediate night time stops were planned at Marrakech, Agadir and Las Palmas. After passing abeam Sidi Ifni on plan the aircraft encountered an extreme depression with extreme winds. The crew however were not able to contact Fuerteventura by HF or VHF radio. Nor were they able to pick up the Fuerteventura NDB or any other beacon. Uncertain about their position, the captain decided ditch the plane near a fishing vessel. It was subsequently established that the Fuerteventura NDB was not operating at the time requested by the Captain in the Flight Plan; the Flight Plan was received in Las Palmas before the aircraft departed Marrakech, but Fuerteventura aerodrome had by that time closed, in accordance with the published hours of watch.

Primary Cause

Radio failure and lack of navigational beacons leading to disorientation and a critical decision to land.Radio failure and lack of navigational beacons leading to disorientation and a critical decision to land.

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