OFF
After a maintenance inspection in the malfunction report there
was the following line: "Above switch doesn't work in OFF
position."
SR-71
(Note: FL600 is 60,000 feet)
Pilot: XX center, YY is requesting FL600.
ATC: Ok YY, it's clear. (Laughing) Climb and maintain FL600, if
you can.
P: Roger, descending to FL600.