I think you might get replies that are more accurate if this thread was posted in Tech/Ops, as this calls for a reply from a professional pilot or similar.
I think that with NG
aircraft and high-performance engines, adjustments to loads in high temperatures are probably not so common these days. Going back several years, adjustments were common when operating to/from airports with high temperatures or high altitude. The special DC10-15s produced for Mexicana and others, a version of the DC10-10 but with higher performance engines for take-offs from hot/high airports, immediately come to mind.
Going back even further to aircraft like the Hawker Siddeley Trident, I recall that she was limited in operations at hot/high airports. We were departing IST
on a Trident 2 one hot day and after push back and taxi to the main runway, the Captain announced that we were returning to the stand to have fuel off-loaded, as we were too heavy to take off in the temperature. There were only about 30-40 passengers on the plane, a light load, and we were departing for ATH
, a short hop on the return to LHR
. Returning to the stand, the engineers refused to off load any fuel, so we had to wait for the temperature to drop before we could take off.
MOL on SRB's latest attack at BA: "It's like a little Chihuahua barking at a dying Labrador. Nobody cares."