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THE END?
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Why
Max weight can be ignored:
The requirement for a fuel dump system is dependant
on the STRUCTURAL capability of the specific aircraft.
A manufacturer will certify an aircraft at a certain
MAX LANDING WEIGHT. However, if the aircraft STRUCTURE
can withstand a landing with FULL FUEL, no fuel dump
is required. Even aircraft with a fuel dump system will
often have an allowed landing weight higher than the
certified landing weight.
The certified landing weight has to do with flap pressures,
runway length requirements, go-around capabilities,
and CG limits. (there are others)
MAX Allowed landing weight may in some cases be
the same as MAX Take OFF weight. This is what you use
for emergencies.
A couple of times, I landed the 777 over max landng
certified weight because weather, runway and fuel conservation
were considered acceptable.
Whenever a captain lands above CERTIFIED landing weight,
a special maintenance check is required. IF the landing
is SMOOTH, it is a minimal check. If the landing is
firm or hard, it is a very long and intensive maintenance
event taking many hours of manpower.
source:http://flyawaysimulation.com/postt8491.html
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