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In 2017, AAR was chosen as the prime contractor for a 15-year, $909 million landing gear award to provide total supply-chain management to support all U.S. Air Force and contractor requisitions received for all C-130, KC-135 & E-3 landing gear parts. [8] Landing gear maintenance at Miami airport. In September 2019, the U.S. Naval Air Systems ...
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The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.
Aircraft Wheels and Configuration Nose section Center section Example 717, 727, 737: 6 wheels [1x2]+[2x2] A Boeing 737 from Southwest Airlines: 747: 18 wheels [1x2]+[4x4] A Boeing 747-400's main landing gear. Note the toes-up bias angle of the bogies on the wing gear, to ensure correct stowage upon retraction: 707, 720, 757, 767, 787: 10 wheels ...
The first flight, while otherwise uneventful, suffered a partial landing gear failure during landing; while the nose gear collapsed, the twenty-two "millipede wheels" saved the aircraft from damage. The cause was determined to be a stuck oleo strut , which was too short when fully extended, and thus easily rectified via the insertion of a ring.
The captain bumped the yoke on the aircraft, causing it to turn off the autopilot. Due to the focus on the landing gear and the minimal changes in the cockpit, the pilots did not notice. Because of this, the aircraft gradually lost altitude and crashed. This was the first hull loss and fatal crash of a Lockheed L-1011 TriStar. [5]