The release is valid for:

The release is valid for:

• A. 2 hours before to 4 hours after ETD
• B. 1 hour before to 3 hours after ETD
• C. 30 minutes before to 2 hours after ETD
• D. 1 hour before to 3 hours after ETD

Answer: (D)

Release validity centers on the time window around the estimated departure when the flight release remains active. This window ensures all preflight tasks—crew pairing, fueling, load planning, and ground handling—are coordinated with the planned departure and can tolerate small delays without needing a new release. The standard policy is that a release is valid from one hour before ETD up to three hours after ETD (ETD = Estimated Time of Departure). Releasing earlier than one hour before ETD or much later than three hours after ETD would mean the release no longer reflects the actual readiness or timing of the flight, so it wouldn’t be valid.

Release validity centers on the time window around the estimated departure when the flight release remains active. This window ensures all preflight tasks—crew pairing, fueling, load planning, and ground handling—are coordinated with the planned departure and can tolerate small delays without needing a new release. The standard policy is that a release is valid from one hour before ETD up to three hours after ETD (ETD = Estimated Time of Departure). Releasing earlier than one hour before ETD or much later than three hours after ETD would mean the release no longer reflects the actual readiness or timing of the flight, so it wouldn’t be valid.