Specifications

SECTION II
AIRPLANE AND SYSTEMS
MODEL 560
POSITION AND WARNING SYSTEM
The landing gear position and warning system provides visual and audible indication of landing gear
position. Three green safe lights and a red GEAR UNLOCK light are located in a group adjacent to the
gear control handle. Each green light corresponds to one gear, NOSE, LH or RH and indicates that it is in
the down and locked position. The red light indicates an unsafe gear position (in transit or not locked). The
landing gear warning system sounds an audible warning when the airspeed is below approximately 150
knots if either throttle is retarded below approximately 70% N
2
and the gear is not down and locked. The
warning horn can be silenced for this condition by depressing the HORN SILENCE switch. The horn will
reset if the throttle is advanced. If the flaps are extended beyond the T.O. & APPR. (15°) position and the
gear is not down and locked, there will be an audible warning that cannot be silenced.
EMERGENCY EXTENSION
In the event of normal system malfunction, a manually operated system is provided to release the
landing gear for free-fall extension.
The manual system is actuated by the red AUX GEAR CONTROL T-handle located under the pilot's
instrument panel. The handle is pulled and rotated clockwise to lock. This action mechanically disengages
the landing gear uplocks, allowing the landing gear to free-fall to the down and locked position and also
unlocks the red, collar-type, blow down knob. Lowering the landing gear by the free fall method is not
advisable at speeds above 200 KIAS, as the gear may not fully extend above that speed. Approximately
180 KIAS with flaps up is the optimum speed/configuration for free fall extension. Yawing the airplane may
be required to achieve green light indications and the pneumatic system should always be used to assure
positive locking of all three gear actuators.
Pulling the red, collar-type knob on the T-handle shaft mechanically ports the emergency air bottle to
the uplock actuators to retract the uplock hooks, and then to the extend side of all three landing gear
actuators. The uplock hooks are unlocked and the gear is driven to the down and locked position. Normal
indications will appear in the cockpit providing the gear handle is down. After actuation of the pneumatic
system, the knob should be left in the extended position. After each use, the system must be serviced.
Figure 2-14. Landing Gear Position Warning
I 2-26 Configuration AA 56OMB-01