In article ,
Dallas wrote:

On Sat, 9 Feb 2008 19:39:06 -0800 (PST), WingFlaps wrote:

Simple question, when refuelling should brakes be on or off (for a
light plane)? I've been told both answers with logical reasons for
both. What should I do???

One day as a student I went out to preflight the airplane before the
instructor came out.

I saw the parking brake and realized I'd never operated it before so I gave
it a good pull. Well, it worked find... but it also wouldn't release.

The instructor came out and we worked on trying to get it to release for 45
minutes. The lesson I took from that experience was, never use the damn
thing unless you absolutely have to.

Most of them are simply a pair of valves to retain the pressure in the
brake lines. You hit the brakes, pull the parking brake cable and that's
all.

To release the parking brake, all you have to do is tap the brakes to
release the valves.

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