Falcon 20 F Retrofit Electrical Flashcards
What are the four sources of electrical power for the aircraft?
Generators, Batteries, APU, GPU
What is the APU rating?
27.5 to 28.5 Volts/300amps
What is the battery rating?
24 - 26 volt/ 36 Amp hour
What is minimum battery voltage to start the engines?
22 volts
Why is 22 volts the minimum required to start the engines?
It takes 18 volts to close 4 P (reverse current relay) and 8 - 10 volts to keep it closed
If battery voltage is below 18 V before the preflight what action must be taken?
Unless the aircraft has SB 172, the batteries must be removed from the aircraft and recharged
How many current limiters protect the batteries?
The #1 battery has 2, and the #2 battery has one current limiter
When checking the current limiters, what would a zero indication on the amp gauge mean?
If the amp gauge is at zero when the #1 battery is turned off, this would mean that the #2 current limiter was bad.
If the battery light illuminates on the master caution panel what does it mean?
Either one or both of the batteries are disconnected from the electrical system.
What would cause one or both of the batteries to disconnect from the electrical system?
- Battery switches are off
- Battery relays failed
- 4P (reverse current relay) is open
How would the pilot know what the cause of battery disconnect is (besides the obvious battery switch being turned off)?
- If 4P (reverse current relay) - no voltage showing on the gauge
- If one or both battery relays failed then voltage will be shown on the gauge
How many amps will cause 4P to open?
400 amps
When do the battery WARM and battery HOT lights illuminate?
WARM - 120º C
HOT - 150º C
What is the maximum number of battery reset attempts allowed?
2
How many batteries are on board the Falcon 20?
Seven
- 2 main batteries
- 1 emergency lighting
- 1 jet pack
- 3 standby computer batteries