Sequence & Resolution
Event Date02/08/2023
Level
Accident
Flight PhaseLanding
Technical Issue Details
•Boeing 737-406(SF) (5N-OTT) experienced a collapse of its left main landing gear shortly after touchdown.
•The accident occurred on cargo flight 4W135 arriving from Libreville (LBV).
•The crew heard a loud bang from the landing gear and felt severe vibrations after applying reverse thrust.
•Investigation revealed the collapse was caused by severe shimmying and dynamic loads, triggering mechanical failure at a pre-existing intergranular crack.
Outcome / Handling
•The captain took control and brought the aircraft to a stop on runway 05.
•The aircraft sustained significant damage to the left wing, engine, and fuselage.
•The three crew members on board evacuated safely without any injuries.
Current Status
•The final investigation report identified excessive play in the apex joint, reduced shimmy damper effectiveness, advanced tire wear, and an undetected structural crack as contributing factors.
•The aircraft was grounded for repairs and inspections.
Sourceaeroinside.com
Flight Information
Flight Number4W135
Landing Runway05 (BZV)