3. Augmented Crews: Four or More Crewmembers a. This subsection 12.C.3. applies to: (i) three (3) required Crewmember aircraft augmented to five (5) Crewmembers; and (ii) two (2) required Crewmember aircraft augmented to four (4) or more Crewmembers. b. The maximum scheduled duty period shall be twenty (20) consecutive hours. Once scheduled, a duty period may be extended on account of operating flight delays caused by weather, mechanical, air traffic control, late ground handling, late loading or curfew, or with Crewmember concurrence if he was delayed on a commercial deadhead that precedes an operating flight to which he is assigned as a flight crewmember, to no more than twenty-two (22) consecutive hours. If the duty period is extended, the applicable Minimum Rest Period shall be extended in one (1) hour increments based on the duty extension (e.g., if the duty period is extended by fifteen (15)