23.954—Fuel system lightning protection.
The fuel system must be designed and arranged to prevent the ignition of fuel vapor within the system by—
(a)
Direct lightning strikes to areas having a high probability of stroke attachment;
(b)
Swept lightning strokes on areas where swept strokes are highly probable; and
(c)
Corona or streamering at fuel vent outlets.
Code of Federal Regulations
[Amdt. 23-7, 34 FR 13093, Aug. 13, 1969]