ARROWil
LANDING GEAR
The Cherokee Arrow II 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 on the instrument panel to the left of the control quadrant The landing gear is
retracted or extended in about seven seconds.
Also incorporated in the system is a pressure sensing device which lowers the gear
regardless of gear selector position, depending upon air speed 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 and/or 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.
WARNING
Avoid ejecting objects out of the pilot storm window which
could possibly enter or obstruct the holes in the mast.
The emergency gear lever, used for emergency extension of the gear, manually releases
hydraulic pressure to pennit the gear to free-fall with spring assistance on the nose gear. The
lever must he held in the downward position for emergency extension. This same 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 airspeed/power combinations. The emergency
gear lever is provided with a latching device which may be used to lock the over
r
ide 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.
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: December S, 1975
2,,3
10
5MPH
=
1
91 KT
85MPH
=
74 KT
(1
30 KT
)
(1
13 KT
)
N16422 POH
