Iranian investigators concluded that poor maintenance, led the Qeshm Air Fokker 100 to gear-up landing on 16 February 2018.
Qeshm Air flight 1202 from Tehran to Mehrabad Airport, Iran, made a force landing at Mashhad airport when the left main landing gear failed to deploy prior to landing.
As it landed the aircraft veered off to left on runway 31R and came to rest between the parallel runways, suffering left wing structure, flap and landing gear damage.
Investigators found that “foreign pollution” entered the hydraulic system while C-check maintenance was being carried out on a restrictor valve and hose from the left-hand landing-gear actuator, and damaged the filter near the valve, which enabled contaminants to block a downstream nozzle, affecting the landing-gear mechanism.
Investigators conclude that “insufficient surveillance” during maintenance and “lack” of experience from Qeshm Air maintenance personnel contributed to the accident.