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FROM YOUR BELL HELICOPTER TEXTRON REPRESENTATIVE.
PRODUCT DATA
JANUARY 2003
HEATED WINDSHIELDS
No. 222-706-206-XXX (HEATED)
No. 222-706-404-XXX (HEATED BIRDPROOF)
The Heated Windshield Kits allows the crew to electrically defog or defrost both
windshields. The kit consists of two 28 Volt DC electrically heated windshields (which
replace the standard ones), four circuit breakers, two control units (left and right), and
a WSHLD DEICE ON OFF switch. When the system is operating, an overtemperature
sensor protects each windshield against overheating. If either windshield becomes
too hot [ above 54°C(130°F)], the IIDS provides a warning/caution message, and
i n t e r r u p t s h e a t i n g p o w e r t h e h o t w i n d s h i e l d u n t i l t h e t e m p e r a t u r e f a l l s [ b e l o w
49°C(120°F)]. The only pilot action required is to reset the MASTER CAUTION light.
Each windshield consists of an outer layer of tempered glass, a middle layer of PPG
®
-
112 plastic, and an inner layer of acrylic plastic (plexiglass) with embedded electrical
heating elements. The heated portion is confined to that area at the average pilots'
optimum eye level, and is approximately 18 centimeters (7 inches) in height, extending
from the windshield centerpost to either crew door post. Electrical connectors, power
distribution, and heat sensing elements are located at the top inboard edge of each
windshield. The heated birdproof windshield has been tested and can withstand a 0.9
kilogram (2 pound) bird strike at sea level V
NE
. In operational temperatures below
minus 17.8°C(0°F), the heating elements must be on in order to retain structural
capabilities (impact resistance) of the windshield. Operating procedures are found in
the FAA Approved Flight Manual Supplement BHT-430-FMS-5.The weight increase
for the H eated Windshield installed is 4.9 kilograms (10.8 pounds), and for the Heated
Birdproof Windshield installed is 6.7 kilograms (14.7 pounds).
IIDS W/C/A WINDOW
L W/S HOT OR R W/S HOT
CAUTION MESSAGE
Summary of Contents for BELL 430
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