SOCATA
MODEL TB 20
SECTION 7
DESCRIPTION
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© 1988, 1991, 1992, 1994 to 1996, 1997, 2000 -
socata
- All rights reserved
June 30, 1988
Revision 8
7.20
A hinge strut provides the mechanical downlock of the nose and main gears.
Mechanically–actuated wheel well doors connected to landing gear are
provided for the nose and main gears.
Hydraulic generator operation is started and stopped by a pressure switch
when landing gear control is on ”up” position.
Post–MOD.151
The footsteps extension/retraction is combined with that of main landing
gears.
LANDING GEAR CONTROL
The landing gear lever is located on the R.H. side of the L.H. panel strip. The
lever has two positions, up and down, which give a mechanical indication of
the gear position selected. From either position, the lever must be pulled out
to clear a detent before it can be repositioned ; operation of the landing gear
system will not begin until the lever has been repositioned. After the lever has
been repositioned, it directs hydraulic pressure within the system to actuate
the gear to the selected position.
LANDING GEAR POSITION INDICATOR LIGHTS
Position indicator lights located adjacent to the landing gear lever indicate the
gear is either down and locked or unlocked.
Separate green gear ”down” indicator lights are provided for each gear and a
red single gear unlocked light illuminates anytime one gear at least is not
locked down or fully up.
The landing gear system is also equipped with gear safety (squat)
microswitches, an emergency extension control and a gear–up warning
system.
The gear unlocked red light and the green gear down lights (one for each
gear) are tested using a push–knob labeled ”TEST” on the annunciator
panel. The green lights are dimmed with the toggle switch labeled ”D/N”
located on the annunciator panel.
