&
BALANCE
BEM
MEASUREMENTS
FREQUENCY
OF
MEASUREMENT
• Individual
Masses
used
–
4
Years
• Fleet
Masses
used
–
9
Years
FLEET
MASSES
SAMPLE
SIZE
2/3
=
n
𝑛+3
4 → 9 =
2
𝑛 + 51
10 + =
10
MAC
• The
aircraft
chosen
must
be
those
with
the
longest
time
since
last
being
weighed.
𝐶𝐺 − 𝐿𝐸𝑀𝐴𝐶
% 𝑀𝐴𝐶 =
𝑀𝐴𝐶
• A
fleet
mass
must
be
determined
at
least
every
48
months.
CALCULATING
MAX
TAKEOFF
MASS
• The
max
takeoff
mass
is
the
lowest
of
the
following:
RTOM
RLM
MZFM
MSTOM
PLTOM
MSLM
PLLM
-‐
N/A
+
Trip
Fuel
+
Takeoff
Fuel