During which event would an aircrew member be automatically placed in DNIF status?

An aircrew member would be automatically placed in DNIF (Duty Not to Include Flying) status during centrifuge training completion due to the nature of the training and its impact on the individual's physiological state. Centrifuge training is designed to simulate high-G forces that aircrew might experience in flight, and the effects of such training can temporarily impair an individual’s ability to fly safely. As a precautionary measure, those undergoing this type of training are placed in DNIF status to ensure they are not engaging in flight operations until they have recovered and are declared fit to fly again.

Scheduled medical checkups, mandatory ground briefings, and periodic evaluation exercises usually do not have the same immediate effects on an aircrew member's ability to perform their duties in flight. These events are typically more routine and do not inherently require a temporary removal from flying status.