Robert M. Gary wrote:

While its possible that someone does it, I'm not aware of any operator
that sets the brake on aircraft when its not occupied. Usually chalks
work just fine and are easier to move when you need to tow. In smaller
aircraft there are other reasons to avoid setting the brake, like
changes in outside pressure could burst the brake seals.

Since the biggest change in outside pressure that is likely to happen
is on the order of a pound and the working pressure in brakes is at
least an order of magnitude greater than that, I find it highly unlikely.

Perhaps if one were to land after extended flight at 10,000 feet at
Tucson in the middle of summer, the drastic temperature change might
have an effect, but I doubt it.

I've heard this many times and yet can imagine no situation other than
maybe leaving the brakes on for months at a time where it would do anything.

Any wrenches out there with real experiance feel free to contridict.


--
Jim Pennino

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