MEL Timelines / Which can be deferred?

• A. Specific interval
• B. 3 days (Deferrable)
• C. 10 days (Deferrable)
• D. 120 days

Answer: (B)

Deferring a MEL timeline means you’re allowed to postpone that milestone to a later date without breaking the rules. The best choice is the option that says three days and is marked as deferrable. This clearly signals a small, approved delay window you can use when needed, which is exactly what deferral is for: a short, controlled postponement that keeps the overall schedule on track.

The other options represent different timing ideas. A specific interval without a deferral label implies you can’t push it. A very long window like 120 days typically isn’t treated as a deferral in MEL settings because it changes the schedule too much. The other deferrable option (ten days) might be governed by a different policy or a different allowable window, depending on the rules in play. So, the three-day deferral is the best match for a permitted, short postponement within MEL timelines.