What should be checked on the electrical synoptic page during an electrical abnormality?

What should be checked on the electrical synoptic page during an electrical abnormality?

• A. Status and voltage/frequency of all AC sources, generator status of G1/G2/APU, TRU status, DC bus voltages, and battery voltage.
• B. Hydraulic system pressures.
• C. Cabin pressure and oxygen levels.
• D. Fuel quantities and fuel flow.

Answer: (A)

When an electrical abnormality happens, the electrical synoptic page is the primary source to gauge the health of the power system. You want to verify the status and the voltage/frequency of every AC source feeding the buses, and confirm which generators are online or failed (G1, G2, and APU). The TRU status matters because transformer-rectifier units convert AC to DC for the buses, and a TRU fault can cascade into DC power loss. Then check the DC bus voltages to ensure essential buses stay powered and note the battery voltage to assess whether battery power is available for critical loads or if charging is occurring. Together, this tells you if power is being supplied from the correct sources, if any source or converter is out of spec, and whether you need to shed nonessential loads or rely on battery power. Other systems listed, like hydraulic pressures, cabin pressure and oxygen, or fuel quantities and flow, aren’t part of the electrical distribution being shown on the electrical synoptic page, so they don’t inform you about the electrical abnormality.

When an electrical abnormality happens, the electrical synoptic page is the primary source to gauge the health of the power system. You want to verify the status and the voltage/frequency of every AC source feeding the buses, and confirm which generators are online or failed (G1, G2, and APU). The TRU status matters because transformer-rectifier units convert AC to DC for the buses, and a TRU fault can cascade into DC power loss. Then check the DC bus voltages to ensure essential buses stay powered and note the battery voltage to assess whether battery power is available for critical loads or if charging is occurring. Together, this tells you if power is being supplied from the correct sources, if any source or converter is out of spec, and whether you need to shed nonessential loads or rely on battery power.

Other systems listed, like hydraulic pressures, cabin pressure and oxygen, or fuel quantities and flow, aren’t part of the electrical distribution being shown on the electrical synoptic page, so they don’t inform you about the electrical abnormality.