(p. 6) Despite the excitement about e-planes, the Federal Aviation Administration has never certified electric propulsion as safe for commercial use. Companies expect that to change in the coming years, but only gradually, as safety concerns are worked out.
. . .
The consensus within the industry is that the F.A.A., which regulates half the world’s aviation activity, is several years from certifying urban air mobility.
“It’s a big burden of proof to bring new technology to the F.A.A. — appropriately so,” Mr. Clark said. Currently the certification process for a new plane or helicopter takes two to three years on average. For an entirely new type of vehicle, it could be considerably longer. (One conventionally powered aircraft that can take off and land without a runway had its first flight in 2003. It remains uncertified.)
For the full story, see:
(Note: ellipsis added.)
(Note: the online version of the story was updated April 18, 2022, and has the title “The Battery That Flies.”)