Commercial rating?

The FAA lawyers make the rules. For instance, a brand new
private pilot may change a tire, but cannot work on the
brakes on the same wheel.

Yes, but those rules are written down in a place labled "rules", where
we can all see them. The FAA also makes other rules that it keeps to
itself, and trots them out when convenient. Their definition of
"compensation" is one such.

Jose
--
Money: what you need when you run out of brains.
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