1. USMC Sikorsky CH-53K - U.S. House Armed Services Committee/Verteidigungsausschuss - May 12 , 2022

Subcommittee on Tactical Air and Land Forces Hearing:
“Fiscal Year 2023 Marine Corps Modernization Programs”

Lieutenant General Mark R. Wise, USMC
Deputy Commandant for Aviation (DCA)

"The diagnostic capability
of this airframe is spectacular.
Meaning the pilot can actually get
a real time engine performance capability readout to make real time decisions
on how the engines are performing regardless of the environment,
but it includes the brownout conditions.
It's actually been expanding
the envelope much wider than those initial assessments indicated.

The other side, too,
is the automation on the airframe, because the automation is designed
to allow a pilot to get that airframe into even the worst brownout conditions
and on the ground safely and minimize its time
in that particulate matter, which also really negates the potential issues you might have
with the brownout conditions.

So far since then,
we have actually demonstrated in the worst brownout conditions, that
that aircraft has performed for 21 minutes in the worst brownout conditions
with zero degradation of the engines.
So it kind of points
back to that initial test parameters can be taken in the wrong way.
We purposely
limit it until we prove ourselves correct as we go out,
but it's been performing brilliantly.
But there are multiple systems on board that make that airplane
the safest one out there."

https://armedservices.house.gov/heari...