Air Line Pilots Association, International EMB 145 Oral Questions Overhead “A” Select “Slide Show” Use the space bar on your computer to advance the presentation and challenge your systems knowledge This is a tool to assist in study of EMB145 systems, but does not constitute a replacement for reading the actual AOM VOL 1 or 2, nor does it contain ALL information contained therein. The actual AOM Volumes are subject to changes and updates.

Air Line Pilots Association, International How many hours does the CVR record?

Air Line Pilots Association, International 2 hours.

Air Line Pilots Association, International What do you have to do to erase the CVR?

Air Line Pilots Association, International The ERASE button must be pushed with the aircraft on the ground with the parking brake set.

Air Line Pilots Association, International What is the first flight of the day check for the CVR?

Air Line Pilots Association, International Press the TEST button and observe the light for 1 second.

Air Line Pilots Association, International How do the GEN buttons normally look?

Air Line Pilots Association, International In and dark.

Air Line Pilots Association, International When do the engine driven generators come online?

Air Line Pilots Association, International At 57% N 2.

Air Line Pilots Association, International What is the output of an engine driven generator?

Air Line Pilots Association, International 400 Amps; 28 Volts.

Air Line Pilots Association, International What is the normal position of the GPU Button?

Air Line Pilots Association, International Out and dark.

Air Line Pilots Association, International What does GPU AVAIL mean?

Air Line Pilots Association, International The presence of GPU power has been detected. Not necessarily acceptable power.

Air Line Pilots Association, International What is the output of the APU generator?

Air Line Pilots Association, International 400 Amps; 28 Volts. (300 Amps above 30,000 ft)

Air Line Pilots Association, International What type of main batteries are installed on the Embraer?

Air Line Pilots Association, International 2 NiCads.

Air Line Pilots Association, International What is the output of each main battery?

Air Line Pilots Association, International 24 Volts; 44 Amps.

Air Line Pilots Association, International How long will the main batteries last in an electrical emergency?

Air Line Pilots Association, International 40 minutes. Note: Can be increased to 45 minutes if you shut-off PITOT 3 heat

Air Line Pilots Association, International How many APU start attempts are assumed in the 40 minutes of main battery power?

Air Line Pilots Association, International 3 attempts.

Air Line Pilots Association, International What is the maximum battery temperature limit?

Air Line Pilots Association, International + 70 o C.

Air Line Pilots Association, International If a main battery temperature exceeds + 70 o C, will it drop offline?

Air Line Pilots Association, International No. You will get an EICAS message.

Air Line Pilots Association, International What should you do if the main battery temperature exceeds + 70 o C?

Air Line Pilots Association, International Refer to the EPC Checklist. The EPC will direct you to turn the respective battery switch to the OFF position.

Air Line Pilots Association, International What does the ESSENTIAL POWER button do?

Air Line Pilots Association, International The ESSENTIAL POWER button forces the “electrical emergency” configuration. The main batteries are connected to the essential busses.

Air Line Pilots Association, International When would you press the ESSENTIAL POWER button?

Air Line Pilots Association, International When directed by the AOM Volume 1. The ELEC ESS TFR FAIL procedure directs you to press this button.

Air Line Pilots Association, International What is the definition of an electrical emergency?

Air Line Pilots Association, International A loss of all 5 generators in flight.

Air Line Pilots Association, International What would the PFD, MFD and EICAS look like in an “electrical emergency?”

Air Line Pilots Association, International PFDs and MFDs would be dark. The EICAS and RMUs would still be lit.

Air Line Pilots Association, International What is an “electric essential transfer failure?”

Air Line Pilots Association, International A situation when the batteries are powering ALL of the DC busses. This happens when you have lost all 5 generators in flight and the EDL fails to automatically open the bus tie contactors.

Air Line Pilots Association, International What would the PFDs, MFDs and EICAS look like during an “electric essential transfer fail?”

Air Line Pilots Association, International They would look normal.

Air Line Pilots Association, International What are the main purposes of the central DC bus?

Air Line Pilots Association, International It connects the GPU and APU to the electrical system and allows load sharing between the busses.

Air Line Pilots Association, International How many generators need to be online to automatically power the shed busses?

Air Line Pilots Association, International 3.

Air Line Pilots Association, International How can you power the shed busses with less than 3 generators online while on the ground?

Air Line Pilots Association, International Select the SHED BUSSES knob to the OVRD position.

Air Line Pilots Association, International Can you power the shed busses with less than 3 generators online while in flight?

Air Line Pilots Association, International No.

Air Line Pilots Association, International What happens if you turn BUS TIES knob to the OFF position?

Air Line Pilots Association, International It opens the bus tie contactors regardless of any command from the electrical system logic.

Air Line Pilots Association, International What happens when the BUS TIES knob is in the AUTO position?

Air Line Pilots Association, International The electrical system logic controls the bus tie contactors.

Air Line Pilots Association, International What happens when the BUS TIES knob is in the OVRD position?

Air Line Pilots Association, International The bus tie contactors close regardless of any command from the electrical system logic unless one of the GCUs detects an over-current condition.

Air Line Pilots Association, International What is an “electric emergency abnormal?”

Air Line Pilots Association, International Electrical Distribution Logic (EDL) has improperly commanded an “electrical emergency” configuration. The bus tie contactors are open, and there are now 3 separate electrical networks. -The batteries are connected to the essential busses. -Generators 1 and 3 are connected to DC Bus 1. -Generators 2 and 4 are connected to DC Bus 2.

Air Line Pilots Association, International In the case of an “electrical emergency abnormal,” can you reconnect the 3 networks?

Air Line Pilots Association, International No. But you can start the APU to power the essential busses and keep the batteries charging.

Air Line Pilots Association, International How is the AC inverter powered?

Air Line Pilots Association, International From DC Bus 1.

Air Line Pilots Association, International What is the purpose of the back-up battery?

Air Line Pilots Association, International It provides stabilized power to the GCUs.

Air Line Pilots Association, International When is the back-up battery connected to the electrical system?

Air Line Pilots Association, International When the BATT 1 knob is selected to AUTO, and the BACKUP button is pressed in.

Air Line Pilots Association, International Can external power charge the back-up battery?

Air Line Pilots Association, International No.

Air Line Pilots Association, International How much power does the back-up battery provide?

Air Line Pilots Association, International 24 Volts; 5 amps.

Air Line Pilots Association, International What type of battery is the back-up battery?

Air Line Pilots Association, International Lead-acid.

Air Line Pilots Association, International Where is the back-up battery located?

Air Line Pilots Association, International In the floor in front of the F/O.

Air Line Pilots Association, International Why do we deselect the back- up battery when “re-booting” the aircraft?

Air Line Pilots Association, International The back-up battery powers the EDL (Electrical Distribution Logic).

Air Line Pilots Association, International When is the ground service bus powered?

Air Line Pilots Association, International When a GPU is connected and both battery contactors and the GPU contactor are open. -GPU Connected -GPU button out -BATT 1 & 2 knobs OFF

Air Line Pilots Association, International When will the “EMG LT NOT ARMED” EICAS message be presented?

Air Line Pilots Association, International When the EMERG LT switch is in either the ON or OFF position.

Air Line Pilots Association, International If the Flight Attendant turns the emergency lights on from the F/A panel, can they be turned off from the cockpit?

Air Line Pilots Association, International No.

Air Line Pilots Association, International How long will the emergency light batteries last?

Air Line Pilots Association, International 15 minutes.