Yes, we absolutely do correct it. This is why it is my job for every flight to calculate the following five weights:A question to all pilots and aviation experts here (and I am not discarding your answer Flyboy, just curious):
Do you correct this MTOW according to the altitude above sea level and lenght of the takeoff runway? Or do you only mind about the rotation speed?
In other words: do you have a MTOW for different runways? (According to lenght and altitude above sea level?)
1. Structural MTOW (that's that 630,500lbs number in case of the MD-11). This one can be lower than the certified number for certain MEL/CDL items
2. Runway-limit weight (that comes right from the dispatch release and is density altitude-dependent, but, oddly enough, in case of the CRJ it's almost always higher than the structural MTOW.)
3. Climb-limiting weight (ditto)
4. Burn-limiting weight (MLW+fuel burn, this is usually the lowest number and is our most restrictive number).
5. ZFW-limiting weight (MZFW+fuel on board, usually the second-most restrictive number).