Learjet 60 - Landing Gear System

Learjet 60

Pilot's Manual
LANDING GEAR SYSTEM
The landing
gear is hydraulically retractable, tricycle gear
with air-
hydraulic shock
strut-type nose and main gear . The main gear
has
dual wheels and brakes
on each strut . Each main gear
wheel is
equipped with two fusible
plugs which will melt and release
tire pres-
sure in the event wheel temperature
reaches 390°F . The brake system
incorporates four power-boosted disc-type
brakes with an integral
anti-skid system .
The nose gear utilizes a
chined tire to prevent
splashing into the
engine inlet . Nose wheel steering
is electrically con-
trolled by the
rudder pedals . Hydraulic pressure
for gear retraction
and extension is transmitted
by a system of tubing,
hoses, and actuat-
ing
cylinders, and is electrically
controlled by limit switches
and sole-
noid
valves . Alternate extension
can be accomplished
pneumatically
in case of hydraulic or electrical
system failure . Two
doors enclose
each main gear after
retraction . The inboard doors
are hydraulically
operated and the outboard
doors are mechanically
operated by link-
age connected to the
main gear struts . The
nose gear doors operate
mechanically with linkage
attached to the nose
gear shock strut .
PM-123

3-5
Original