A Boeing 737-322 experienced a landing gear collapse during a flight from Canc£n to Mexico City-Benito Ju rez International Airport (MEX) due to a structural failure of the left-hand main landing gear. The aircraft was operating at 10 nautical miles out when the crew requested a visual approach for landing on runway 05L. The landing resulted in a strong vibration, leading to the collapse of the left-hand landing gear. The probable cause was a fracture of the shimmy damper piston and subsequent retraction of the left leg assembly, resulting from vibrations during the landing run, which couldn?t be damped due to wear and play between the dynamic parts of the links, fittings, and apex joint.A Boeing 737-322 experienced a landing gear collapse during a flight from Canc£n to Mexico City-Benito Ju rez International Airport (MEX) due to a structural failure of the left-hand main landing gear. The aircraft was operating at 10 nautical miles out when the crew requested a visual approach for landing on runway 05L. The landing resulted in a strong vibration, leading to the collapse of the left-hand landing gear. The probable cause was a fracture of the shimmy damper piston and subsequent retraction of the left leg assembly, resulting from vibrations during the landing run, which couldn?t be damped due to wear and play between the dynamic parts of the links, fittings, and apex joint.