Originally Posted by
Pearly White
Water off a duck's back.
I have never flown an Airbus, never will, and I don't fly much at all these days except for fun, but I've probably flown higher and faster than most here. With a handle like yours you might understand.
Just thought it odd that one aircraft was flying lower on multiple sectors that day than other aircraft of the same type with the same paint job. Interesting theory that old mate is concerned about flying near the edge of the graph, and I get that. But 280 is way below the Armstrong line, and as was pointed out, not quite as fuel efficient. The accountants must have missed that flight.
Reported turbulence most likely reason. Nobody is flying at 280 because they're scared of REC MAX.