landing gear 
noun
The undercarriage of an aircraft.It is thought the seat of the fire was in the landing gear under the aircraft's main fuselage....
- You may get killed walking across the street when you can get hit by a landing gear falling from an aircraft.
- On touchdown, all three landing gears were sheared and the aircraft underside was substantially damaged.
- straight arrow
- straightaway
- straight chain
- straight chair
- straight-cut
- straight edge
- straight-eight
- straighten
- straightener
- straightening iron
- straight-faced
- straight flush
- straightforward
- straightforwardly
- straightforwardness
- straight from the shoulder
- straightish
- straightjacket
- straight-laced
- straight-line
- straightly
- straight man
- straightness
- straight off (or out)
- straight (or right) away