truck beam

English

The main landing gear of a Boeing 777, showing the fore-and-aft truck beams which carry the six wheels on each main gear.

Noun

truck beam (plural truck beams)

1. (aviation) A fore-and-aft horizontal beam at the lower end of the gear strut of a multi-axle landing gear bogie, upon which are mounted the multiple axles of the bogie.
   • 2010 February 9, Air Accidents Investigation Branch, “1.6.13 Landing gear”, in Report on the accident to Boeing 777-236ER, G-YMMM, at London Heathrow Airport on 17 January 2008‎^[1], archived from the original on 12 April 2022, page 28:

     [A Boeing 777 main landing gear assembly] comprises a shock strut, at the top of which is the MLG trunnion; at the lower end is a truck beam with three axles and six wheels. The truck beam rotates in pitch about a pivot at the base of the shock strut and a truck position actuator tilts the truck when the aircraft is airborne.