Layvr / Answers
Maximum FDP depends on local report time and sector count under ORO.FTL.205. A 1, 2 sector duty reporting 06:00, 13:59 allows up to 13 hours; more sectors and night reports reduce the limit. Table: https://layvrcrew.com/blog/easa-fdp-explained/
EASA FDP table, All crew answers