When does the amber FAULT light illuminate on the IDG pushbutton?

When does the amber FAULT light illuminate on the IDG pushbutton?

• A. Oil Temperature is too high
• B. Oil Pressure is too low
• C. Oil Level is low
• D. Electrical power failure

Answer: (B)

The amber FAULT light on the IDG pushbutton lights up when the generator has a fault condition, most commonly when the oil pressure is too low. Oil pressure is essential for the IDG’s lubrication and proper operation; if it drops below the safe threshold, the protection logic trips the generator offline to prevent damage, and the FAULT indicator illuminates. Other issues, like high oil temperature or low oil level, have their own indications or won’t trigger this particular amber FAULT light, and an electrical power failure would show up as a loss of generation rather than a FAULT indication on the IDG pushbutton.

The amber FAULT light on the IDG pushbutton lights up when the generator has a fault condition, most commonly when the oil pressure is too low. Oil pressure is essential for the IDG’s lubrication and proper operation; if it drops below the safe threshold, the protection logic trips the generator offline to prevent damage, and the FAULT indicator illuminates. Other issues, like high oil temperature or low oil level, have their own indications or won’t trigger this particular amber FAULT light, and an electrical power failure would show up as a loss of generation rather than a FAULT indication on the IDG pushbutton.