KV ERJ Preflight (9) Flashcards
Why is it important that only displays 2 and 3 are showing on initial power-up?
DC power only simulates an ELECTRICAL EMERGENCY. During this condition with no assistance from the RAT, the batteries will supply essential loads for 10 minutes. If more than displays 2 & 3 are showing during initial power up, then the electrical load is increased thus decreasing the amount of time the batteries will supply power during an ELECTRICAL EMERGENCY.
Why must battery voltage be checked before applying AC power?
Battery voltage must be checked before applying AC power to receive an accurate display of the battery voltage. Once AC power has been applied, the voltage displayed on the MFD is the voltage of the AC source (GPU/APU).
If Battery 1 is showing 22.5 volts and Battery 2 indicates 21..4 volts, what action must the pilots take?
Voltage less than 22.5v and greater than 21.0v: Recharge the batteries prior to takeoff through any AC source, including the engines during taxi. (SOPM 4-1.8)
What is the purpose of charging the batteries prior to takeoff?
To ensure the batteries will supply essential loads for at least 10 minutes during an ELECTRICAL EMERGENCY.
What should the pilot check prior to conducting a fire panel test? Why?
Verify there are no fire protection fail messages displayed on the EICAS after power up. (SOPM 4-1.9) (SOPM 4-1.32) If there are active fire protection faults, an effective test of the fire detection and protection system is not possible.
Describe the items associated with a successful fire test on the overhead panel.
Overhead Panel: Fire Handles illuminated, Cargo Smoke FWD & AFT buttons illuminated, APU button illuminated, Upper half of the APU Emergency Stop Button illuminated. (SOPM 4-1.9)(AOM V2 14-07-30)
1) Aural Warning
2) Fire Handles illuminated
3) CARGO SMOKE FWD / AFT buttons illuminated.
4) APU button illuminated
5) Upper half of the APU Emergency Stop Button illuminated
6) Warning lights flashing
7) CARGO FWD / AFT SMOKE EICAS message
8) “APU FIRE” EICAS message
9) “ENG 1(2) FIRE” EICAS message message
10) “FIRE” warning annunciation displayed inside ITT indicators.
How do you determine if the AC power supplied by the GPU is within the proper limits?
AC GPU icon on Electric Synoptic page is green. If any output is invalid or out of range, the digits are replaced by three amber dashes. (AOM V2 14-05-05.9)
GPU button on overhead panel illuminates when AC power quality requirements are satisfied. (AOM V2 14-05-10.3)
Upon establishing AC power on the aircraft, what test should automatically start?
Electric PBIT. (SOPM 4-1.12)
Is the electrical PBIT required to complete every flight?
No - every 50 hours…