Capt.Doug writes:

Typically alternate pucks in the calipers will be powered by different
hydraulic systems. The parking brake will use one set of pucks.

So setting the parking brake in a large aircraft has some of the same
disadvantages as in a small aircraft, if hydraulic pressure is being
maintained.

Did you retrack the gear into the wheel-wells with elevated temperatures?
That could be a major fire hazard.

Unfortunately, yes. I only found out that the brakes were very hot by
accident, and I was well into my departure by then.

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