Emergency abort
Emergency abort means cessation of vehicle flight during ascent or descent in a manner that minimizes risk to public health and safety and the safety of property. Emergency abort involves failure of a vehicle, safety-critical system, or flight safety system such that contingency abort is not possible.
Source
14 CFR § 401.5
Scoping language
For the purposes of parts 415, 417, 431, 435, 440, and 460 of this chapter, the following definitions apply: