Incident Overview

Date: Saturday 9 August 1958
Aircraft Type: Vickers 748D Viscount
Owner/operator: Central African Airways
Registration Number: VP-YNE
Location: 9 km SE of Benghazi-Benina International Airport (BEN) – ÿ Libya
Phase of Flight: Approach
Status: Destroyed, written off
Casualties: Fatalities: 36 / Occupants: 54
Component Affected: Aircraft Flight Control System (specifically, the altimeter)Aircraft Flight Control System (specifically, the altimeter)
Category: Accident
A Vickers Viscount aircraft, operating on the Zambezi service from Salisbury, Rhodesia to London, UK, struck high ground approximately 5.5 miles south of the runway after a direct approach. The incident occurred during en route stops in Ndol, Entebbe, Khartoum, and Wadi Halfa. Following refueling, the aircraft flew to Benina and received clearance for a direct runway 33R approach. A 20-30 second delay in obtaining the approach permission, due to a pilot’s misinterpretation of an altimeter reading, is suspected to be the probable cause of the impact.A Vickers Viscount aircraft, operating on the Zambezi service from Salisbury, Rhodesia to London, UK, struck high ground approximately 5.5 miles south of the runway after a direct approach. The incident occurred during en route stops in Ndol, Entebbe, Khartoum, and Wadi Halfa. Following refueling, the aircraft flew to Benina and received clearance for a direct runway 33R approach. A 20-30 second delay in obtaining the approach permission, due to a pilot’s misinterpretation of an altimeter reading, is suspected to be the probable cause of the impact.

Description

The Vickers Viscount plane was being operated on CAA’s Zambezi service from Salisbury, Rhodesia to London, U.K. The aircraft departed Salisbury at 07:13, August 8. En route stops were Ndola, Entebbe, Khartoum and Wadi Halfa. After refueling, the flight left Wadi Halfa for Benina at 21:20. At 01:12 the crew were cleared into the Benina Control Zone. A direct runway 33R approach permission was requested and granted. At 01:15, some 20-30 seconds after obtaining this permission, the aircraft struck high ground, 5,5 miles SE of the runway. PROBABLE CAUSE: “When making an approach to runway 330deg Right and whilst flying in cloud, the pilot descended below the correct height thus permitting the aircraft to strike high ground. The reason why the pilot descended so low, 5,5miles from the aerodrome, cannot be established, but the probable cause is that he misinterpreted the reading of his altimeter. The possibility that his efficiency had been reduced by fatigue and a slight indisposition cannot be excluded.”

Source of Information

https://books.google.nl/books?id=tFk-AAAAIBAJ&pg=PA1&dq=libya+%22central+african%22&article_id=4165,4074219&hl=en&sa=X&redir_esc=y#v=onepage&q=libya%20%22central%20african%22&f=falsehttps://books.google.nl/books?id=tFk-AAAAIBAJ&pg=PA1&dq=libya+%22central+african%22&article_id=4165,4074219&hl=en&sa=X&redir_esc=y#v=onepage&q=libya%20%22central%20african%22&f=false

Primary Cause

Pilot misinterpretation of an altimeter reading during an approach to runway 330deg Right while flying in cloud.Pilot misinterpretation of an altimeter reading during an approach to runway 330deg Right while flying in cloud.

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