Originally Posted by
ASRAAMTOO
So to summarise, last week you are not landing overweight, this week you are.
The problem there lies with the company policy, associated training and its application.
It is 2019, the manufacturers are ready to help and put all their knowledge and customers' operating wisdom into the guidelines already. If those are seen as vague it means getting more specific had drawbacks here and there that would be too impractical to deal with or undesirably restrictive. It is easy to to create policies for the calculated, but when the unforeseen arrives one could find himself missing tools needed for the job very easily.
For instance the article wiggy linked has all you need.
- staying inside the Operational Landing Limit {which is never higher than the structural) is a legal requirement
- there is no technical aspect preventing an overweigt landing. Extensive description how and why.
- as long as the landing performance works with standard landing flap (on the runway one just departed from it always does, by a factor 2,5 ish).
My short? The A/C is built per certification requirements to enable an overweight landing at MTOW. You foul nothing doing so, and reasoning around the legal aspect is the single remaining task.
If you need a more definite clause, inevitably the discussion stucks over the meanings of "needed", "ensure safety" "preferable" or similar. Terms that are subjective constructs and have no measurable meaning to begin with. Watch the other distinguished posters draw swords over "not recommended" and "non recommended". Both probably native English speakers and pilots.