King Air C90GTi, Руководство по подготовке пилотов

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1 4 - 8 ) . T h e sw i t c h h a n d l e m u s t b e p u l l e d
out of a detent before it can be moved from
either the UP or DN position.
S a f e t y s w i t c h e s ( F i g u r e 1 4 - 1 0 ) c a l l e d
“squat” switches, on the main gear shock
str ut, open the control circuit when the oleo
strut is compressed. The squat switches must
close to actuate a solenoid, which moves a
downlock hook on the LDG GEAR CON-
TROL switch to the released position. This
mechanism prevents the LDG GEAR CON-
TROL switch handle from being placed in
the UP position when the air plane is on the
g round. The downlock hook automatically
unlocks when the airplane leaves the ground.
The downlock hook disengages when the
airplane leaves the ground because the squat
switches close and a circuit is completed
through the solenoid that moves the hook.
In the event of a malfunction of the down-
lock solenoid or the squat switch circuit,
t h e d ow n l o c k h o o k c a n b e ove r r i d d e n by
pressing downward on the red DOWN LOCK
REL button. The release button is located
j u s t l e f t o f t h e L D G G E A R C O N T RO L
switch handle.
The LDG GEAR CONTROL handle should
never be moved out of the DN detent while
t h e a i r p l a n e i s o n t h e g r o u n d . I f i t i s , t h e
l a n d i n g g e a r wa r n i n g h o r n w i l l s o u n d i n -
t e r m i t t e n t ly, a n d t h e r e d g e a r- i n - t r a n s i t
l i g h t s i n t h e L D G G E A R C O N T R O L
sw i t c h h a n d l e w i l l i l l u m i n a t e ( p r ov i d e d
t h e M A S T E R S W I T C H i s O N ) , wa r n i n g
t h e p i l o t t o r e t u r n t h e h a n d l e t o t h e D N
p o s i t i o n .
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
14-9
FOR TRAINING PURPOSES ONLY
14
LANDING
GEAR
AND
BRAKES
Figure 14-9. Hydraulic Fluid Indicator
Figure 14-10. Safety Switch