When ACARS is inoperative, what four-word entry must flight crew enter (the acronym OOOI) when a flight is operated?

• A. Out, Off, On, In
• B. On, In, Out, Off
• C. In, Out, Off, On
• D. Off, In, On, Out

Answer: (A)

Recording OOOI captures the flight’s four milestone times by hand when ACARS isn’t available. Each word matches a step in the real sequence of a flight: Out is when the aircraft leaves the gate and begins pushback, Off is when the wheels leave the ground for takeoff, On is when the aircraft is on the ground after landing and taxis toward the gate, and In is when the aircraft is parked at the gate and the flight is complete. This order mirrors how a typical trip unfolds, making Out, Off, On, In the correct four-word entry.