FRAT Builder

Flight Risk Assessment — GREEN / AMBER / RED. Advisory; tune thresholds with your DO. Runs in your browser.

Hours until departureLegsDuty period (hrs)Crew legality Night International Single pilot PIC not current on type

GREEN

No risk factors flagged.

FRAT is advisory risk guidance, not a regulatory determination. AMBER calls for documented mitigations; RED calls for DO/chief-pilot approval. Operational control stays with the certificate holder (14 CFR 135.77). Tune the model with your DO.

In Clearspar, the FRAT scores automatically on every quote

Pulled from the real trip, crew, and the 135.267 result — no manual entry. See it →