What 91.9 actually says is:

...unless there is available in the aircraft a current approved
Airplane or Rotorcraft Flight Manual, approved manual material,
markings, and placards, or any combination thereof.

....except that we were speaking specifically to a bo that was type
certified, flown, and delivered prior to March 1 1979. There was no such
thing as an "approved flight manual" for light aircraft at the time this
sucker was riveted together.



So the answer is it depends on whether or not there are limitations
in the flight manual that aren't in something else such as a placard.

As for W&B, just a copy of the latest iteration is required.

Because the current W&B is part of the current limitations.

That's true, but nothing in 91.9 requires the carriage of current
limitations on board the aircraft. There are placards required to be on
board by the type certificate, but my read of the tc for the s-model makes
no mention of this being a required document.

Do I keep one on board? You betcha, both a printed version and one on my
pda. Not required.

Jim