19990215001359A

Acft left main landing gear collapsed on landing. (.19) on February 15, 1999, at 1143 hours mountain standard time, a Cessna 414, N1557T, sustained substantial damage when the left main gear collapsed during touchdown on runway 26R at Phoenix sky Harbor airport, Phoenix, Arizona. The aircraft lost control following the gear collapse and subsequently struck three sets of runway lights. The private pilot/owner of the aircraft was not injured. The airplane had departed scottsdale airport at 1220 and was en route to sky Harbor airport for routine maintenance. The aircraft was being operated under CFR part 91 of the federal aviation regulations when the accident occurred. Visual meteorological conditions prevailed at the time of the accident and a flight plan was not filed for the flight. The pilot told safety board investigators that the airplane had just had the bushings on the landing gear replaced approximately 8 hours before the date of the accident. (.4)the pilot landed on runway 26R with three green landing gear down indicator lights. He said that the airplane seemed to roll normally down the centerline for approximately 200 feet, then the left landing gear collapsed and the airplane subsequently veered off the runway and struck taxiway lights. Postaccident investigation of the airplane revealed that the attachment location of the left main landing gear for the downlock bellcrank was separated and the attachment bolt was sheared. Additionally, there was a significant difference in the downlock tension adjustment of the landing gear components of the left side versus the right side of the airplane. System rigging of the landing gear requires adjustments to the fork bolt and the push-pull tube, which must be made together and in the same amount in opposite directions. The failed components were tested for chemical composition and hardness and all met their material specifications. Metallurgical examination of the parts disclosed that all fractures and bends were a direct result of an overload event. Maintenance records established that a re-rigging was performed on the airplane following the maintenance work on the landi ng geat system 10 days and 11 flight hours prior to the accident. (-23)landed 26R at phx. Touched down at 110 to 115 mph. On final had full flaps and normal down and locked indication for all three landing gear. Om landing after approximately 200 at 300 foot rollout and at an estimated speed of 90 to 100 mph the pilot started to raise the flaps. While raising the flaps the plane sunk down into the left wing. As soon as the left prop hit the ground the pilot shut down the left engine. At this point the estimated speed was 80 to 90 mph. After sliding approximately 2,000 feet the left wing struck three taxi way lights, one of which punctures the wing. The left wing skidded through a gravel area causing the plane to rotate 90 degrees to the left and come to rest with the tail pointing toward the runway.