Part 135 Duty & Rest Calculator
14 CFR 135.267 + 135.247, with the citation for every finding. Free, runs in your browser, nothing stored.
Currency & cumulative (optional)
Advisory decision support only. Operational control remains with the certificate holder (14 CFR 135.77). Validate against your OpSpecs and GOM.
This is the exact engine that gates a quote inside Clearspar. Your inputs never leave this page.
Frequently asked
What are the 14 CFR 135.267 flight time limits?
For unscheduled one- and two-pilot crews, 135.267(b) limits flight time in any 24 consecutive hours to 8 hours for one pilot and 10 hours for two pilots. 135.267(a) sets cumulative limits of 500 hours per calendar quarter, 800 per two consecutive quarters, and 1,400 per calendar year.
How much rest does 135.267 require?
135.267(d) requires at least 10 consecutive hours of rest during the 24-hour period preceding the planned completion of the assignment. Reduced rest is possible under 135.267(e) but never below an 8-hour floor, and requires scheduled compensatory rest.
Is this calculator a substitute for my Director of Operations?
No. It is advisory decision support that cites the regulation. Operational control always remains with the certificate holder under 14 CFR 135.77. Validate every assignment against your own OpSpecs and General Operations Manual.
This check runs automatically on every quote in Clearspar
Same engine, but on your real crew, before a quote goes out — so an illegal trip never gets sent. See it on your fleet.