Originally Posted by
dastocks
I was on a flight recently where the undercarriage was lowered for about 20 minutes in the cruise in order to burn off excess fuel that had been loaded by mistake before we had departed, so clearly it is possible.
Under EASA you are allowed to depart if the Expected landing weight (dispatch) exceeds the required weight for landing performance. You will need to file two alternates.
Inflight - The expected landing weight must be at or below the landing perf limit weight.