Originally Posted by
AEpilot76
Alternate brakes are...
Makes sense. Not sure how that results in locked brakes, though. Perhaps the initial report mischaracterized the problem? Seems more likely that they had a tire fail due to reduced anti-skid on landing.
Originally Posted by
bernardd
Forgive my ignorance here, but doesn't the fact they went back to POS, presumably with a fairly heavy aircraft, suggest it was quite a serious hydraulic problem?
That would make sense. If it was just a brake problem, not effecting any other portions of the hydraulic system, then I would think it would be more likely that they would continue to MIA. I'm not qualified in the 757/767 so don't know the specifics, however. There could be certain attributes of the braking system that would make a failure there a more serious situation than we'd otherwise assume.
I know of a cargo DC8 that lost their main system hydrualics (leaves only normal rudder power and brakes and reversers on accumulators) on departure from a Central American city. That crew continued to MIA without main hydraulics. Wasn't considered an emergency situation.