
Super 80 Professional – AOM
LANDING GEAR
Section 18 Page 3
Super 80 Professional – Aircraft Operating Manual
Coolsky, 2018
Main Gear Doors
The main gear doors consist of a
hydraulically operated main door and a
mechanically operated outboard door. The
main gear doors are mechanically latched
when closed. The main gear doors cycle to
the closed position when the gear is
approaching the extended position.
Visual/aural Indicating and Warning
System
The landing gear position and status is
indicated by annunciator lights on the
upper main instrument panel. Three landing
gear position lights come on green to
indicate that the landing gear is down and
locked. The lights will come on red when the
landing gear is in any intermediate position.
The landing gear door annunciator will
come one anytime either of the main
landing gear doors are not closed and
latched.
The landing gear warning horn and vocal
warning will sound when the airplane is at or
below 210 KTS and either one of the throttles
are closed and the landing gear handle is
not in the down position. The landing gear
warning horn and vocal warning will also
sound whenever the flaps are extended to
beyond 26 degrees and the landing gear
handle is not in the down position.
Reference markings on each main gear
landing gear over-center linkage provide
visual confirmation that the landing gear is
down and locked. Nose gear verification is
provided by a green indicator pin on the
pedestal just behind the throttle quadrant.
Brakes
Each main gear wheel is fitted with a dual
system, disc-type power brake. Each brake
contains two independent cylinder and
passageway systems. Each system contains
four hydraulic cylinders, one bleed port and
one hydraulic pressure port.
The wheel brakes are controlled by two
completely independent hydraulic brake
systems. Each system is capable of supplying
reserve brake pressure in the event of a
hydraulic pressure failure in the other system.
The airplane wheel brakes may be
mechanically applied by depressing the
brake pedals.
A fully automatic anti-skid system is installed
to obtain a more effective braking
application, through control of wheel
rotation at the point of maximum braking
efficiency. The system is deactivated
whenever the landing gear handle is not in
the down detent, parking brakes set, arm
switch at OFF, or airplane is at low taxi
speeds.
Both main landing gear wheels and nose
gear wheel are fitted with spin brakes. The
purpose of the spin brake is to stop the tire
rotation after take-off.
A gauge and annunciator light proved
visual indication of brake temperature.
The parking brakes are set by pulling up the
park brake control knob (located on the
captain’s left console). Park brake on is
indicated by an annunciator light on the
overhead panel. If the throttles are
advanced to a take-off setting with the
parking brake set, the aural/vocal warning
system will be activated.