Piper AZTEC D PA-23-250 Owner's Handbook Manual page 55

THE PIPER AZTEC "D"
SECTION Ill
gear control knob alone, as hydraulic pressure may cause the
control handle to flip into neutral before the gear is in position
and locked.
In the event· of hydraulic system failure caused by a line
breaking or the powerpak malfunctioning, the landing gear can be
lowered by using the Emergency Gear Extender. The control for
the extender is located beneath a small cover plate under the
pilot's seat. When this control is pulled,
co
2
flows from a cyl-
inder under. the floorboards through separate lines to shuttle
valves adjacent to the gear extension cylinders. The gas pres-
sure opens the shuttle valves, allowing C02 to enter the gear
cylinders, extending the gears.
WARNING
The landing gear control on the selector valve
must be in the "down" position when the gear
extender control is pulled, in order to allow the
gear to be extended properly . .
The Emergency Gear Extender should only be used when all
other means of lowering the landing gear have failed, and only
when the gear can be left down for landing.
CAUTION
When the ·extender has been used, the landing
gear or flaps must not be actuated hydraulically
in any way until the extension system has been
returned to its normal condition.
6. In-Flight Cabin Door Closing Procedure:
In the event the cabin door is inadvertently unlocked in
flight or should the handle not be pushed forward and locked
before take-off and becomes dislodged from its latching posi-
tion, the following procedure has been determined to be prac-
ticable for closing the cabin door while in flight, assuming
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