When gear box oil temperature reaches 140 degrees Celsius, which feature deactivates?

When gear box oil temperature reaches 140 degrees Celsius, which feature deactivates?

• A. Fuzz Burn
• B. Chip IBIT
• C. FD Couple
• D. Overheat Warning

Answer: (A)

At high gearbox oil temperatures, the system uses protective actions to reduce further heat buildup and keep the gearbox from damage. When the oil reaches 140°C, the feature that is designed to automatically shut off is Fuzz Burn. This deactivation helps lower the thermal load by removing a nonessential function, giving the gearbox a better chance to cool and stay within safe limits. The other options aren’t the protective deactivation used in this scenario: an overheat warning would alert you to the condition but wouldn’t turn off a function; a diagnostic test (IBIT) is used for checks and isn’t a temperature-triggered deactivation; and a mechanical FD couple isn’t the deactivation mechanism tied to oil temperature.

At high gearbox oil temperatures, the system uses protective actions to reduce further heat buildup and keep the gearbox from damage. When the oil reaches 140°C, the feature that is designed to automatically shut off is Fuzz Burn. This deactivation helps lower the thermal load by removing a nonessential function, giving the gearbox a better chance to cool and stay within safe limits. The other options aren’t the protective deactivation used in this scenario: an overheat warning would alert you to the condition but wouldn’t turn off a function; a diagnostic test (IBIT) is used for checks and isn’t a temperature-triggered deactivation; and a mechanical FD couple isn’t the deactivation mechanism tied to oil temperature.