§ 121.387 Flight engineer.
No certificate holder may operate an airplane for which a type certificate was issued before January 2, 1964, having a maximum certificated takeoff weight of more than 80,000 pounds without a flight crewmember holding a current flight engineer certificate. For each airplane type certificated after January 1, 1964, the requirement for a flight engineer is determined under the type certification requirements of § 25.1523.
§ 25.1523 Minimum flight crew.
The minimum flight crew must be established so that it is sufficient for safe operation, considering --
(a) The workload on individual crewmembers;
(b) The accessibility and ease of operation of necessary controls by the appropriate crewmember; and
(c) The kind of operation authorized under § 25.1525. The criteria used in making the determinations required by this section are set forth in appendix D.
§ 25.1525 Kinds of operation.
The kinds of operation to which the airplane is limited are established by the category in which it is eligible for certification and by the installed equipment.