Accident description
Last updated: 30 July 2014
Status:Final
Date:Tuesday 31 March 1992
Time:10:40
Type:Silhouette image of generic B703 model; specific model in this crash may look slightly different
Boeing 707-321C
Operator:Trans-Air Service
Registration: 5N-MAS
C/n / msn: 18718/368
First flight: 1964
Total airframe hrs:60895
Cycles:17907
Engines: 4 Pratt & Whitney JT3D-3B (HK)
Crew:Fatalities: 0 / Occupants: 5
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 5
Airplane damage: Damaged beyond repair
Location:Istres (   France)
Phase: En route (ENR)
Nature:Cargo
Departure airport:Luxembourg-Findel Airport (LUX/ELLX), Luxembourg
Destination airport:Kano International Airport (KAN/DNKN), Nigeria
Flightnumber: 671
Narrative:
The Boeing 707 took off from Luxembourg at 07:14 for an IFR flight to Kano, carrying 38 tonnes of freight. The aircraft, on a heading of 199deg, when passing VILAR and the VOR of Martigues, was authorized to leave FL290 for FL330. This flight section was performed in IMC in turbulent air. With the throttles at climb power and autopilot engaged the aircraft was flying at 280 knots IAS passing FL320. At this moment, the crew was experiencing severe turbulence and heard a double 'bang'. The aircraft suddenly rolled to the right. The captain disengaged autopilot and struggled to keep control by countering with control stick and rudder pedals. The continuous fire warning system sounded, but could not be switched off by the flight engineer. The first officer noted that the no. 4 engine had separated and sent out a Mayday call (at 08:11). The crew started the descend towards Marseilles and initiated the fuel dumping procedure. During the descent the first officer noted an airfield ahead (which was Istres) and was Marseilles transferred the aircraft to Istres Control. A left hand circuit was flown for a runway 15 landing at Istres. The plane touched down slightly to the left of the centreline at a 190 knots speed. Emergency brakes had to be used to decelerate. The left main gear tyres burst during the landing roll and the flight engineer selected maximum reverse thrust on the no. 2 engine. After a 2300m ground roll, the 707 went off the left side of the runway and stopped 250m further on. The fire on the right wing (which had erupted in the final approach phase) was put out. The landing took place at 08.35, about 24min after engine separation. The aircraft had just been acquired by Trans-Air Service and had started flying on March 3, 1992 after having been stored at Southend since October 24, 1990. Between March 4 and Mach 31 the aircraft had accumulated 116 flying hours in 34 flights.

PROBABLE CAUSE: "The accident resulted from the fracture of the right inboard engine pylon fitting, in such conditions that this engine came to hit and tore away the outboard engine. The AD, imposing periodic monitoring of the midspar fitting, proved to be insufficiently efficient."

Classification:
Engine separation
Forced landing on runway

Sources:
» ICAO Adrep Summary 3/92 (#4)
» Report concerning the accident that occurred at Istres on 31 March 1992 to Boeing 707 5N-MAS (Nigeria) Trans-Air Service Ltd. / Bureau Enquetes-Accidents
» Scramble 155

Official accident investigation report
investigating agency: Bureau d'Enquêtes et d'Analyses (BEA) - France
report status: Final
report number: BEA 5-AS920331
download report: Rapport relatif à l'accident survenu le 31 mars 1992 au Boeing 707 immatriculé 5N-MAS (Nigéria) exploité par la Compagnie Trans-Air Limited (BEA 5-AS920331)

Photos

photo of Boeing 707-321C 5N-MAS
Add your photo of this accident or aircraft
 

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 Luxembourg-Findel Airport to Kano International Airport as the crow flies is 4154 km (2596 miles).

languages: English Français Nederlands Deutsch Espanol

Share
Share

Boeing 707

  • 127th loss
  • 858 built
  • 68th worst accident (at the time)
  • 77th worst accident (currently)
safety profile

 France
  • 151st worst accident (at the time)
  • 175th worst accident (currently)
»safety profile