What happened
During the landing rollout phase of flight, the right main landing gear of a Fokker F100 collapsed.
The investigation
An investigation into company maintenance records showed that the torque link damper on the right main landing gear had been serviced using an internal company maintenance task/job card. This procedure failed to follow the specific maintenance instructions provided in the aircraft manufacturer's maintenance manual. Additionally, the necessary tools, specifically a replenishing gun, were not available at the time of the service to properly maintain the torque link damper assembly.
An examination of the failed components by the NTSB Materials Laboratory Division identified fractures originating at the base of the upper torque link attach lug. These fractures exhibited a chevron pattern, which indicated that the failure was caused by overstress. No evidence of preexisting cracks was found on the components.