Trip Legality Summary

A flight can be illegal even if each check passes in isolation. A crew member may be within rest minimums but have lapsed night currency. An aircraft may be airworthy but have an expired Cat B MEL item. Running each check independently creates gaps. This tool combines the three most common dispatch-blocking conditions into a single pass/fail verdict, the same way a dispatch system should.

Under 14 CFR 135.267(c), the maximum duty period is 14 consecutive hours for all Part 135 crewmembers. This applies to both single-pilot and two-pilot operations. The flight time limit within that duty period is 8 hours for single-pilot and 10 hours for two-pilot operations under 135.267(a).

Under 14 CFR 135.179 and the standard MEL procedures, the day of discovery is excluded from the deferral interval. A Cat B item (3-day interval) discovered on Monday is due no later than the end of Thursday. This tool excludes the discovery day when computing the deadline.

Under 14 CFR 135.247(a), a PIC must have made at least 3 takeoffs and 3 landings within the preceding 90 days during the period beginning 1 hour after sunset and ending 1 hour before sunrise. Day currency (takeoffs and landings regardless of time) is a separate 90-day requirement. This tool checks both if night operations are planned.

No. This tool runs the same checks a Director of Operations performs before dispatch, but it cannot account for your specific GOM limits, OpSpecs authority, aircraft-specific MEL conditions, or operational control factors. It is an advisory pre-check, not a legal dispatch authorization.