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XT 582 Maintenance Manual
Issue 1.0
September 21st 2005
Page 60
32. LANDING GEAR
32.00.00 General
The XT trike base landing gear assembly consists of a tricycle type undercarriage. Both the front and
the rear suspension incorporate air shocks that allow pneumatic adjustment of the “spring rate” and
fluid flow damping.
32.10.00 Undercarriage
General Maintenance
With the weight removed from each wheel, and check each of the components is not loose. Also check
each of the bearings, tyre wear and the condition of the brake line.
Where excessive looseness is found the bushes and attachment points should be checked for wear
and replaced if necessary. In practice this will mean that any pivot point should not have more than
1/2mm of movement, when load is applied. The main areas that need to be checked for looseness are
suspension pivots, the mast pivot, and the main mast pivot hole. For wheel and suspension pivots the
wheels should be lifted from the ground when testing the movement.
32.10.10 Structure
Rear
The main (Rear) undercarriage is manufactured from 6061 extruded aluminium tubing which attaches
to fittings that in turn attach to the pivot locations. The rear suspension layout consists of tubular main
struts for the rear suspension, an airfoil shaped drag link and airfoil shaped rear strut. These are
attached to the wheels and the frame via fittings.
The fittings are manufactured from 2011 aluminium and AS 1163 Steel, welded and bolted to the struts
and drag link.
Front
The front suspension, steering and braking assembly is manufactured from welded AS 1163 Steel. It is
a regular fork type assembly with welded lugs and bushes for all attached parts. The fork carrier
assembly has two bearings pressed into it for attachment onto the main frame.
Damage
Both the front and rear undercarriage allow for minor damage that does not result in dimensional
changes of the materials (Permanent deformation). Tell tale signs of permanent deformation include
chipped paint around highly stressed areas and crazing of the alloy members. Any permanent
deformation warrants full checking of all possible effected parts.
32.10.20 Air Shocks
The life of the shocks should exceed that of the aircraft due to the minimal amount of travel they will do
on the ground, though they still need to be checked regularly for correct operation. If one of the shocks
has lost air then they will sag a different amount on the ground relative to each other.
