Landing Gear; Main Gear; Nose Gear; Brake System - Cirrus SR22 Pilot's Operating Handbook And Flight Manual

Section 7 Cirrus Design
Systems Description SR22

Landing Gear

Main Gear

The main landing gear are bolted to composite wing structure between
the wing spar and shear web. The landing gear struts are constructed
of composite material for fatigue resistance. The composite
construction is both rugged and maintenance free. The main wheels
and wheel pants are bolted to the struts. Each main gear wheel has a
15 x 6.00 x 6 tire with inner-tube installed. Standard wheel pants are
easily removable to provide access to tires and brakes. Access plugs
in the wheel pants can be removed to allow tire inflation and pressure
checking. Each main gear wheel is equipped with an independent,
hydraulically operated single cylinder, dual piston, disc brake.

Nose Gear

The nose gear strut is of tubular steel construction and is attached to
the steel engine mount structure. The nose wheel is free castering and
can turn through an arc of approximately 170 degrees (85 degrees
either side of center). Nose gear shock absorption is accomplished by
an oleo strut. Steering is accomplished by differential application of
individual main gear brakes. The tube-type nosewheel tire measures
5.00 x 5.

Brake System

The main wheels have hydraulically operated, single-disc type brakes,
individually activated by floor mounted toe pedals at both pilot stations.
A parking brake mechanism holds induced hydraulic pressure on the
disc brakes for parking. The brake system consists of a master
cylinder for each rudder pedal, a hydraulic fluid reservoir, a parking
brake valve, a single disc brake assembly on each main landing gear
wheel, temperature sensors, and associated hydraulic plumbing and
wring.
Braking pressure is initiated by depressing the top half of a rudder
pedal (toe brake). The brakes are plumbed so that depressing either
the pilot's or copilot's left or right toe brake will apply the respective
(left or right) main wheel brake. The reservoir is serviced with Mil-H-
5606 hydraulic fluid.
Brake system malfunction or impending brake failure may be indicated
by a gradual decrease in braking action after brake application, noisy
or dragging brakes, soft or spongy pedals, excessive travel, and/or
7-24 P/N 13772-004
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