What would cause both amber and red OIL PX annunciators to illuminate?

The illumination of both the amber and red OIL PX annunciators indicates a critical condition regarding oil pressure within the aircraft's engine system. The correct answer refers to a scenario where the engine oil pressure is between 15 and 40 psi for over 5 seconds.

In this context, the amber annunciator serves as a caution indicator, signaling that the oil pressure is approaching a potentially unsafe range. If the pressure remains in that range for an extended period, it indicates a persistent problem that could lead to engine performance issues or damage. The red annunciator, on the other hand, signifies a warning of an unacceptable condition that requires immediate attention.

When the oil pressure is in the specified range for more than 5 seconds, it triggers both indicators to illuminate, alerting the pilot to take corrective action. This situation is critical as it can lead to engine failure if not addressed promptly.

Other options may suggest conditions that do not lead to the simultaneous illumination of both lights. For example, oil pressure above 40 psi typically would not trigger the annunciators since that indicates a satisfactory operating condition. Conversely, pressure below 15 psi would generally trigger an immediate red light for a serious condition but might not illuminate the amber light simultaneously. Fluctuating pressure may intermitt