Term
What are the ratings of the CRJ's two batteries? |
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Definition
APU battery is a 24v, 43amp nickle nicad battery, and the main battery is a 24v, 17 amp Nickle NiCad |
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Term
What does the green DC AVAIL light mean? |
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Definition
External DC is plugged in and is the correct voltage and polarity |
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Term
What does the green AC AVAIL light mean? |
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Definition
External AC is plugged in and is the correct frequency, phase and voltage |
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Term
What are the sources of 115v AC power? |
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Definition
2 IDG's (integrated drive generators) APU generator, Air driven generator, And AC ground power |
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Term
When can the pilot reset a circuit breaker in flight? |
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Definition
Under the direction of a QRH procedure or when in the judgement of the PIC it is necessary for the safe completion of the flight. |
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Term
What two components compromise the IDG? |
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Definition
CSD (constant speed drive) and a generator |
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Term
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Definition
It utilizes an internal oil system to hydr-mechanically to change variable input speed from the engine accessory gearbox to a constant speed output for the generator of 12,000 RPM. |
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Term
What provides electrical power if there is a complete loss of AC in flight? |
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Definition
ADG, The air driven generator provides 15 KVA AC power |
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Term
What is the KVA rating of the IDG's? |
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Definition
30 KVA up to 35,000 feet, 25 KVA up to 41,000 feet |
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Term
What two conditions will cause the IDG to automatically disconnect? |
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Definition
Over torque (aproximately 3300 lbs ) and, Over-temp ( 168 degrees C case temperature ) |
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Term
If you manually disconnect an IDG, can you get it back in flight? |
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Definition
NO, it can only be reset on the ground |
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Term
What is the KVA rating of the APU generator? |
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Definition
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Term
What is the AC bus priority? |
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Definition
Onside, APU, Cross side, and external power |
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Term
How many TRU's does AC bus 2 power? |
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Definition
Three U TRU 2, ESS TRU 2, and SERV TRU through the AC SERV bus |
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Term
AC ESS bus in normally powered how? |
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Definition
By AC bus 1, however it can be manually or automatically transfered to AC bus 2 |
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Term
What would the indication be if AC ESS was being powered by AC bus 2? |
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Definition
The The AC ESS XFER ALTN light will come on |
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Term
What is the power priority of the AC ESS bus? |
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Definition
AC bus 1, AC bus 2, ADG bus |
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Term
What will the indication be if the ADG has deployed? |
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Definition
EMER POWER ONLY EICAS message |
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Term
What are the conditions to auto deploy the AGD? |
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Definition
All AC power is lost, Last AC power source was internal, weight off wheels, and parking brake off |
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Term
What does the DC SERV switch do? |
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Definition
Connects the DC SERV bus to the APU BATT DIR bus |
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Term
What is on the DC EMER bus? |
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Definition
Engine and APU fire extinguishers, and fuel and hyd. shut off valves |
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Term
What bus ties are manual vs automatic? |
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Definition
Ties 1 and 2 are automatic or manual, ESS tie is manual only |
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Term
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Definition
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Term
Why is it essential to pull the AGD handle, even if it has automatically deployed? |
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Definition
Pulling the handle “locks the aircraft in a weight off wheels “condition preventing the loss of DC ESS on landing. |
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Term
How long can the batteries provide backup power if all electrical is lost? |
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Definition
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Term
What are the electrical ratings of the TRU's? |
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Definition
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Term
How would you isolate an AC bus? |
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Definition
By pressing the onside AUTO XFER INHIBIT switch light and then turning off the affected generator |
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Term
Why is it essential to pull the AGD handle, even if it has automatically deployed? |
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Definition
Pulling the handle “locks the aircraft in a weight off wheels “condition preventing the loss of DC ESS on landing. |
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