Runway excursion Incident Saab 340B UR-ELZ,
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ASN Wikibase Occurrence # 388203
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Date:Thursday 1 June 2023
Time:14:18 UTC
Type:Silhouette image of generic SF34 model; specific model in this crash may look slightly different    
Saab 340B
Owner/operator:UN, opby Air Urga
Registration: UR-ELZ
MSN: 340B-359
Year of manufacture:1994
Total airframe hrs:33496 hours
Cycles:30800 flights
Fatalities:Fatalities: 0 / Occupants: 31
Aircraft damage: None
Location:Tombouctou Airport (TOM/GATB) -   Mali
Phase: Landing
Nature:Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:Bamako Airport (BKO/GABS)
Destination airport:Tombouctou Airport (TOM/GATB)
Investigating agency: NBAAI
Confidence Rating: Accident investigation report completed and information captured
After landing at Timbuktu Airport at 14:18 UTC and setting the engine control levers to ground idle, the left engine reverse (L-Beta) warning did not activate and the co-pilot informed the captain that the right engine reverse (R-Beta) warning was activated only. The captain moved the control levers (PLs) to angles corresponding to the reverse sector, which caused the right engine to reverse thrust and, as a result, a simultaneous rightward turning moment. Despite the measures taken by the flight crew, the aircraft rolled off the runway.
The aircraft was not damaged as a result of the incident. The occupants were not injured.

The cause of the incident, which resulted in the aircraft rolling off the runway during landing, was the movement of the engine control levers (PLs) to the reverse sector before the Beta light was activated and insufficient actions to keep the aircraft on the runway.
Contributing factors:
A contributing factor was the non-synchronous setting of the PLs with a 6° angle difference.

Accident investigation:
Investigating agency: NBAAI
Report number: 
Status: Investigation completed
Download report: Final report



Revision history:

22-May-2024 13:45 ASN Added
22-May-2024 13:48 ASN Updated [Cn, Location, Narrative]
22-May-2024 14:23 RobertMB Updated [Date]
22-May-2024 14:23 RobertMB Updated [[Date]]

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