(a) Space Shuttle Elements consists of the Orbiter, an External Tank, two Solid Rocket Boosters, Spacelab, Upper Stage Boosters (Solid Spinning Upper Stage and Interim Upper Stages) and others as specified in NASA Management Instruction 8040.9.
(b) The flight crew consists of the commander, pilot, and mission specialist(s).
(c) A flight is the period from launch to landing of a Space Shuttle--a single round trip. (In the case of a forced landing the Space Shuttle commander's authority continues until a competent authority takes over the responsibility for the Orbiter and for the persons and property aboard.)
(d) The flight-phases consist of launch, in orbit, deorbit, entry, landing, and postlanding.
(e) A payload is a specific complement of instruments, space equipment, and support hardware/software carried into space to accomplish a scientific mission or discrete activity.
(f) Personnel on board refers to those astronauts or other persons actually in the Orbiter or Spacelab during any flight phase of a Space Shuttle flight (including any persons who may have transferred from another vehicle) and including any persons performing extravehicular activity associated with the mission. [45 FR 14845, Mar. 7, 1980, as amended at 56 FR 27899, June 18, 1991]