DISTRIBUTION
The power distribution system functions as a
single system, but it is really separate systems in-
terconnected by a series of current limiters and
circuit breakers. Figures 2A-14 and 2A-15 illus-
trate power distribution. It is possible to power
almost all DC electrical equipment from one
generator through the interconnected buses or
only certain buses by operation of the bus and/or
bus-tie circuit breakers. Starting with SNs 24-130
through 24-229, and 25-003 through 25-064, all
circuit breakers are accessible to the crew dur-
ing flight. There are certain hot-wired circuits
connected to the batteries and are as follows:
• Left stall warning (all models)
• Right stall warning (all models)
•Cabin door motor (all models)
• Entry lights (door step light, center aisle
light[s], and baggage compartment
lights) (all models)
•Firewall shutoff valve warning lights
(airplanes equipped with glareshield
warning lights)
• Left standby fuel pump (23 models with-
out jet pumps)
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