Term
| What is the minimum voltage required to close the battery relays to connect the batteries to the battery charging bus? |
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Definition
16 VDC (CAE number)
7 VDC to 18 VDC (Bombardier numbers) |
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Term
| What are the minimum battery voltages for start? |
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Definition
Nicad= 23 VDC
Lead Acid= 24 VDC (25 VDC if over 110 degrees F) |
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Term
| If both 275 amp current limiters fail, what effect will this have on the electrical system? |
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Definition
| The generators can not recharge the batteries. All items connected to the Battery Charging Bus including essential buses on aircraft without AMK 85-1 (SN 35-509 and below) will continue to operate until the batteries are depleted. Ammeters will indicate normal system draw. Voltmeter will indicate battery voltage. |
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Term
| If the Left Main Bus and the Main Bus tie circuit breakers have opened, what has possibly happened? |
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Definition
| The Left Main Bus has a fault and has been isolated from the electrical system |
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Term
| What buses and inverter are connected to the Right Generator Bus? |
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Definition
| Right Power, Right Main, and Battery Charging Bus and Secondary Inverter |
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Term
| What event disengages the starter and opens the second serial start relay? |
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Definition
45% N2 or 50% N2 depending on fuel computers installed
45% N2 SN 35-245+ and prior aircraft with 1142 fuel computers |
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Term
| What are the load limitations on the gernerators? |
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Definition
320A on the ground
400A in the air |
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Term
| The DC circuit breakers are what type? |
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Definition
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Term
| What DC buses are "HOT" all the time and what systems are connected to them? |
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Definition
DC Left Battery Bus: Left Stall
Entrance Lights
Door Motor
DC Right Battery Bus: Right Stall |
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Term
| What is the maximum allowable amperage from the ground power unit? |
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Definition
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Term
| What is the minimum allowable amperage from the ground power unit? |
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Definition
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Term
| How could you tell if a 50A current limiter is blown during the preflight? |
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Definition
| A silver pin protrudes from the top of the current limiter |
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