Which describes the proper procedure for testing an aircraft generator with a load to verify charging capability?

Which describes the proper procedure for testing an aircraft generator with a load to verify charging capability?

• A. Ignore the generator until the engine reaches max RPM.
• B. Test by starting the engine and immediately disconnecting all electrical loads.
• C. Start the engine, bring the generator online, attach a representative load, verify system voltage stays within spec, monitor generator output current and regulator behavior, and observe for proper voltage regulation.
• D. Turn off the engine and disconnect the generator.

Answer: (C)

Testing the charging capability means proving the generator can deliver the required electrical load while the engine is running so power is produced under operating conditions. Start the engine, bring the generator online, attach a representative load, verify system voltage stays within spec, monitor the generator output current and regulator behavior, and observe for proper voltage regulation. This approach confirms the charging system can sustain the battery and loads, and that the regulator responds correctly to changes in load to maintain the set voltage without excessive fluctuation. Ignoring the generator until max RPM, disconnecting loads, or turning the engine off does not exercise the charging path under realistic load or test the regulator’s response and stability.

Testing the charging capability means proving the generator can deliver the required electrical load while the engine is running so power is produced under operating conditions. Start the engine, bring the generator online, attach a representative load, verify system voltage stays within spec, monitor the generator output current and regulator behavior, and observe for proper voltage regulation. This approach confirms the charging system can sustain the battery and loads, and that the regulator responds correctly to changes in load to maintain the set voltage without excessive fluctuation. Ignoring the generator until max RPM, disconnecting loads, or turning the engine off does not exercise the charging path under realistic load or test the regulator’s response and stability.