Originally Posted by
MaxKts
Sec25.H.b.ii has your answer. Basically you retain the 18 hours and have the option of remaining eligible for sub or elect OTP for the rest. Trip must fit in sub window. Cant find the answer to going over original guarantee but chances are they will not assign you anything if only 4 hours left and if it did go over you get paid overage. Hope this helps
Sec 25.H.3.b.ii pertains to an election in the first Sub window. If no trip is offered during that window, he may elect OTP for the remainder of the Sub Window, or he may elect to remain in substitution.
The question posed assumes that he has remained in substitution, so the OTP election is gone. It's no longer an option. If he refuses a sub trip in a subsequent Sub Window, the entire Sub guarantee is forfeited. (Sec 25.H.6.iii.(b).)
Again, on the "lengthened" question. The Sub window ends 4 hours after the original trip ended. The showtime and scheduled termination of a substitution trip must be within a pilot’s substitution window. That's the limit of how much the trip can be extended -- 4 hours.
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