In the event of high engine oil temperature, what procedure should the crew follow?

• A. Decrease thrust to reduce oil temperature.
• B. Increase thrust within N1 limit.
• C. Continue with current thrust setting.
• D. Shut the engine down.

Answer: (B)

When oil temperature is high, the first step is to improve cooling by increasing oil flow. Pushing thrust up within the N1 limits raises the oil pump speed and increases the amount of oil circulated, while also increasing ram air through the cooler. This combination helps transfer heat away from the oil more effectively, bringing the temperature down without exceeding engine limits. Staying within N1 ensures you don’t overspeed the engine while addressing the overheating.

Decreasing thrust would reduce cooling flow and make the situation worse, continuing at the same thrust won’t address the overheating, and shutting the engine down is reserved for persistent or unsafe conditions beyond normal corrective action. Monitor oil temperature and related parameters after adjusting, and follow further as required by the abnormal procedures if the temperature doesn’t respond.