King Air C90GTi, Pilot Training Manual

Page: 106 / 557

DIMMING
The war ning annunciators, caution annun-
ciators, advisor y annunciators, MASTER
WA R N I N G f l a s h e r, a n d M A S T E R C AU -
TION flasher feature both a “bright”and a
“dim” mode of illumination intensity.
T h e d i m m o d e w i l l b e s e l e c t e d a u t o m a t i -
c a l ly wh e n eve r a l l o f t h e f o l l ow i n g c o n -
d i t i o n s a r e m e t :
• A generator is on line.
• T h e OV E R H E A D F L O O D L I G H T i s
OFF.
• The MASTER PANEL LIGHTS switch
is ON.
• T h e P I L OT F L I G H T L I G H T S
are ON.
• The ambient light level in the cockpit
(as sensed by a photoelectric cell lo-
c a t e d i n t h e ov e r h e a d l i g h t c o n t r o l
panel) is below a preset value.
Unless all these conditions are met, the mode
will be selected automatically.
TESTING AND LAMP
REPLACEMENT
The lamps in the annunciator system should
be tested before ever y flight and any time
t h e i n t e g r i t y o f a l a m p i s i n q u e s t i o n .
Depressing the PRESS-TO-TEST b utton,
located to the right of the annunciator panel
in the glareshield, illuminates all the an-
nunciator lights and the MASTER WARN-
I N G f l a s h e r. A n y l a m p t h a t f a i l s t o
illuminate when tested should be replaced.
The annunciator panel style allows each an-
n u n c i a t o r t o b e r e m ov e d f r o m t h e p a n e l
(Figure 4-4). Each readout annunciator con-
tains two lamps. To replace any annuncia-
t o r l a m p , f i r s t d e p r e s s t h e c e n t e r o f t h e
annunciator with your f inger. Release your
f i n g e r, a n d t h e a n n u n c i a t o r w i l l p o p o u t
slightly. Pull the annunciator from the panel,
and remove the lamp from the rear of the
annunciator. Replace the failed lamp with
a s p a r e l a m p c o n t a i n e d i n a n u n u s e d a n -
nunciator. Depress the annunciator until it
locks in place.
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
4-5
FOR TRAINING PURPOSES ONLY
4
MASTER
W
ARNING
SY
STEM
LAMPS
(REMOVE FAULTY LAMPS AND REPLACE)
PARTIAL EJECTION
VIEW OF THE ANNUNCIATOR
PANEL FROM ABOVE
1/16 IN
Figure 4-4. Lamp Replace