If the observed tailwind is 11 knots, is operation permitted?

• A. Yes
• B. No
• C. Only on dry runways
• D. Only with approval

Answer: (B)

The important idea here is that takeoff and landing operations have a maximum allowed tailwind. Tailwinds make stopping distances longer and can reduce braking effectiveness, so limits are set to keep operations safe. If the observed tailwind exceeds that limit, the maneuver isn’t allowed.

In this scenario, the tailwind is 11 knots, which is above the standard permitted limit (typically 10 knots). Therefore, operation is not permitted. The other options don’t apply because the rule is a fixed limit, not a matter of runway type or needing special approval in this context.