14 C.F.R. § 33.69 Ignitions system.
Title 14 - Aeronautics and Space
Each engine must be equipped with an ignition system for starting the engine on the ground and in flight. An electric ignition system must have at least two igniters and two separate secondary electric circuits, except that only one igniter is required for fuel burning augmentation systems. [Amdt. 33–6, 39 FR 35466, Oct. 1, 1974]
Title 14: Aeronautics and Space
PART 33—AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES
Subpart E—Design and Construction; Turbine Aircraft Engines
§ 33.69 Ignitions system.
