Page 38 - March19

its battery bus connection then the emergency egress
windows will switch to their independent power units
and operate clear on a 45 +/-two-minute timer.
These independent power supplies are connected
such that when the Furnishings/Interiors Master
switch is on they charge from the ship power.
They have a red charging LED on them to which
extinguishes when the unit is at full charge. Brand-
new and fully charged they have enough power for
two 45-minute cycles.
Switch Locations C90 and B200
The Furnishing Master is located on the Co-Pilot Sub
Panel. The Cabin Shades Master is located on the
Overhead Lighting Panel.
B300
Both the Interior Master and Cabin Shades Master are
located on the Overhead Lighting Panel.
ATA 56 – Electronic Window Shade Power Supply
Capacity Test
LJ-2129 and after; BY-207, BY-239, BY-250 and
after; BZ-1 and after; FL-954, FL- 1010, FL-1031
and after
The test for power supply capacity is performed after
insuring the battery is fully charged. The recharge
time for a fully discharged battery is approximately
2.5 hours. To recharge the battery where it can
complete a 45-minute cycle would take approximately
45 minutes of charge time. Charging can be achieved
by either placing the ship on a ground power source
with the Main Ship Power and Furnishings/Interior
Master switch on for more than 45 minutes or visually
confirming the red charge LED located on the power
supply is extinguished before starting. The test then
when the aircraft is powered down the 45 +/- two-
minute timer does not start until the non-emergency
egress windows have gone dark.
If the emergency power supplies do not have enough
power to complete the 45-minute timer then the
shades may strobe as the timer tries to continue
placing them in a clear state.
ATA 56 – Electronic Window Shade Switch
Upgrades
C90GT, Serials LJ-2129 thru LJ-2132 which came
with 130-384089-33 Switches.
To replace these switches with the new style 130-
384089-35 Switches will require Kit 101-3305-
36 •
­ KING AIR MAGAZINE MARCH 2019