2A-15
FOR TRAINING PURPOSES ONLY
• Right standby fuel pump (23 models
without jet pumps)
•Freon and cabin fan systems (SNs 23-
002 through 23-069)
• No smoking/fasten seat belt light (some
airplanes)
• Emergency pitch trim (SNs 24-130
through 24-229, and 25-003 through
25-064)
•Cabin dump valve (SNs 24-130 through
24-180, and 25-003 through 25-026, and
25-028)
Battery Bus
SNs 23-003 through 24-189, and
25-003 through 25-029
The battery bus is connected directly to the
GPU receptacle and both batteries. The bat-
teries may be charged by a GPU with the bat-
tery switch in OFF. The battery bus is
connected to the battery charging bus by turn-
ing on the battery switch. This also permits ei-
ther generator to charge the batteries. With
the battery switch in OFF, the generators sup-
ply power to all airplane equipment except
the batteries and hot-wired items.
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