Which of the following strings represents the minimum crew positions on the 767K-300 ER?

• A. 1L, 1R, 2L, 2R
• B. 1L, 1R, Mlc, 2L, 2R
• C. 1L, 1R, Mlc, 2L
• D. 1L, Mlc, 2L, 2R

Answer: (B)

Extended-range widebody flights require more than just a captain and a first officer in the flight deck. A relief pilot is needed to cover rest breaks without leaving the aircraft without qualified hands at the controls. For the 767K-300 ER, the minimum crew setup includes the two primary pilots (captain on the left, first officer on the right) plus a dedicated relief position (Mlc) and two additional cockpit seats (2L and 2R) to ensure continuous supervision and control during long legs. Putting all five positions together—1L, 1R, Mlc, 2L, and 2R—satisfies the minimum staffing requirement. The other options omit either the relief position or one of the additional cockpit seats, so they don’t meet the minimum crew rule for this aircraft.