ARROW I1
LANDING GEAR
The Cherokee Arrow I1 is equipped with a retractable tricycle landing gear, which is
hydraulically actuated by an electrically powered reversible pump. The pump is controlled by a
selector switch of the instrument panel to the left of the control quadrant. The landing gear is
retracted or extended in about seven seconds.
WARNING
Avoid ejecting objects out of the pilot storm window
which could possible enter or obstruct the holes in the
mast.
I
Some aircraft also incorporate a pressure sensing device in the system which lowers the gear
regardless of gear selector position, depending upon airspeed and engine power (propeller
slipstream). Gear extension is designed to occur, even if the selector is in the up position, at
airspeeds below approximately
105 mph with power off. The extension speeds will vary from
approximately 85 mph to approximately 105 mph depending on power settings and altitude. The
device also prevents the gear from retracting at airspeeds below approximately 85 mph with full
power, though the selector switch may be in the up position. This speed increases with reduced
power
andor increased altitude. Manual override of the device is provided by an emergency gear
lever located between the front seats to the left of the flap handle. The sensing device operation is
controlled by differential air pressure across a flexible diaphragm which is mechanically linked to a
hydraulic valve and an electrical switch which actuates the pump motor. A high pressure and static
air source for actuating the diaphragm is provided in a mast mounted on the left side of the fuselage
above the wing. Any obstruction of the holes in this mast will cause the gear to extend. An optional
heated mast is available to alleviate obstruction in icing conditions. The optional heated mast is
turned on whenever the
PITOT HEAT is turned on.
The emergency gear lever, when held in the raised position, can be used to
override the system,
and gear position is then controlled by the selector switch regardless of
airspeedlpower
combinations. The emergency gear lever is provided with a latching device which may be used to
lock the override lever in the up position. The latch is located on the left side panel of the console
below the level of the manual override lever. To lock the override lever in the up position, raise the
override lever to the full up position and push in the latch. A yellow warning light located below the
gear selector switch flashes to warn the pilot that the automatic gear lowering system is disabled.
The latch is spring loaded to the off position to aid disengagement. To disengage the latch raise the
override lever and release. The lever will return to its normal position and the yellow flashing light
will extinguish. The lever must also be latched in the raised (up) position when gear-up stalls are
practiced.
The emergency gear lever, when used for emergency extension of the gear, manually releases
hydraulic pressure to permit the gear to free-fall with spring assistance on the nose gear. The lever
must be held in the downward position for emergency extension.
Gear down and locked positions are indicated by three green lights located below the selector,
and a yellow light for in-transit positions is located at the top of the panel. An all lights out
condition indicates the gear is up. The landing gear should not be retracted above a speed of 125
mph and should not be extended above a speed of 150 mph.
AIRPLANE AND SYSTEMS
REVISED: JANUARY
31,1987
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