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Accident description
Last updated: 21 October 2017
Status:
Date:Tuesday 13 September 1994
Time:11:55
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Operator:Aerocontractors Company of Nigeria
Registration: 5N-ATQ
C/n / msn: 538
First flight: 1977
Engines: 2 Pratt & Whitney Canada PT6A-27
Crew:Fatalities: 1 / Occupants: 2
Passengers:Fatalities: 1 / Occupants: 3
Total:Fatalities: 2 / Occupants: 5
Airplane damage: Damaged beyond repair
Location:ca 14 km NE Abuja International Airport (ABV) (   Nigeria)
Phase: Approach (APR)
Nature:Domestic Non Scheduled Passenger
Departure airport:Lagos-Murtala Muhammed International Airport (LOS/DNMM), Nigeria
Destination airport:Abuja International Airport (ABV/DNAA), Nigeria
Narrative:
The Twin Otter crashed after striking trees with the right wingtip and horizontal stabilizer. The trees were located on a 2700 feet hill; the MDA at that point is 3700 feet. A runway 22 instrument approach had to be flown due to bad weather (heavy rain, low clouds, severe turbulence), but the ILS glide path was out of calibration. The pilot is believed to have been flying an ILS localizer approach and using the AU VOR/DME. The pilot possibly thought the AU VOR was located at the runway threshold, while it was actually located 1,3nm short of it, causing a premature descent.

Probable Cause:

CAUSE: Navigation error by the Commander of the aircraft in tracking, the V.O.R signal on the final approach phase of the flight into Abuja Airport. The turbulent weather was also considered to have contributed to the accident.

Classification:


Controlled Flight Into Terrain (CFIT) - Mountain

Sources:
» ICAO Adrep Summary 1/95
» Scramble 185


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Lagos-Murtala Muhammed International Airport to Abuja International Airport as the crow flies is 509 km (318 miles).
Accident location: Approximate; accuracy within a few kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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