Empty-Weight CG RangeThe fuel tanks

Empty-Weight CG Range
The fuel tanks, seats, and baggage compartments of
some aircraft are so located that changes in the fuel or
occupant load have a very limited effect on the balance
of the aircraft. Aircraft of such a configuration show an
EWCG range in the TCDS. [Figure 5-5] If the EWCG is
located within this range, it is impossible to legally load
the aircraft so that its loaded CG will fall outside of its
allowable range.