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Date:Sunday 16 September 2018
Type:Silhouette image of generic B744 model; specific model in this crash may look slightly different
Boeing 747-428FER
Operating for:Saudi Arabian Airlines
Leased from:ACT Airlines
Registration: TC-ACM
MSN: 32867/1318
First flight: 2002-11-06 (15 years 11 months)
Total airframe hrs:65550
Engines: 4 General Electric CF6-80C2B5F
Crew:Fatalities: 0 / Occupants: 3
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 3
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Frankfurt International Airport (FRA) (   Germany)
Phase: Approach (APR)
Departure airport:Dammam-King Fahad International Airport (DMM/OEDF), Saudi Arabia
Destination airport:Frankfurt International Airport (FRA/EDDF), Germany
Saudi Arabian Airlines flight 931 from Dammam, Saudi Arabia, lost the inboard fore flap of the right wing on touchdown at Frankfurt International Airport, Germany.
The aircraft landed on runway 07R in darkness at 05:07 hours local time and taxied to parking position S506 on the cargo apron. Some three hours later several holes and scratches were noticed on the aircraft fuselage along with damage on the leading edge of the vertical stabilizer. A subsequent inspection showed that the inboard fore flap of the right wing, measuring 8x1 meters, was missing.
The missing part along with attachment parts were located next to the runway near the touchdown area.

Probable Cause:

The flap holder was destroyed by a pronounced oscillation fracture (vibratory corrosion cracking), which started in a corrosion trough.

Accident investigation:
Investigating agency: BFU Germany
Status: Investigation completed
Duration: 1 year and 9 months
Accident number: BFU18-1394-AX
Download report: Final report
Language: English

Issue with flap(s)
Runway mishap



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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 Dammam-King Fahad International Airport to Frankfurt International Airport as the crow flies is 4342 km (2714 miles).
Accident location: Exact; deduced from official accident report.

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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