2 comments:
I'd like to bet the problem would have been successfully solved in the olden days with a 3 man flight crew and a Flight Engineer addressing the problem.
It was earlier pointed out here the unusual (electrical) Altn Gear Extend on the 767 was because it was designed wth a Flt Engineer, and a "mechanical wind handle" (or similar). When the Flt Engineer got "removed", the motor to drive this system was implemented.
was a completely independent failure (caused by popped CBs)
Co-incidences are rare, and need to be checked they truly are. Nobody seems to allow for the fact that this CB might have popped when the Altn Extn button was operated? Who knows the condition of the motor / the system? Was there a temporary seizure (frozen water?) in the system somewhere that caused the CB to trip? By the time the aicraft has sat on the runway for X days, been lifted and dragged off to the hangar, who knows what "issues" disappeared / melted away / resolved themselves?
Something, or somebody tripped that CB. The assumption here is that is was "somebody" and others failed to notice / check. It would be pretty hard to
prove it was not tripped as per design at the time?