FAA Advisory Circular 43.13-1B
Acceptable Methods, Techniques, and Practices
Aircraft Inspection and Repair
AC 43.13-1B | 10. Weight and Balance | 2. Weighing Procedures | 10-17. Weight and Balance Extreme Conditions
AC 43.13-1B
9/8/98
(3) The minimum weights, arms, and
moments of the items of useful load that are
located ahead of the rearward c.g. limit. A
typical example of the computation necessary
to make this check, using this data, is shown in
figure 10-11.
10-18. LOADING CONDITIONS
AND/OR PLACARDS. If the following
items have not been covered in the weight and
balance extreme condition checks and are not
covered by suitable placards in the aircraft, ad
ditional computations are necessary. These
computations should indicate the permissible
distribution of fuel, passengers, and baggage
that may be carried in the aircraft at any one
time without exceeding either the maximum
weight or c.g. range. The conditions to check
are:
report all required, optional, and special
equipment installed in the aircraft at time of
weighing and/or subsequent equipment
changes.
a. Required equipment items are listed in
the pertinent Aircraft Specifications.
b. Optional equipment items are listed in
the pertinent Aircraft Specifications and may
be installed in the aircraft at the option of the
owner.
c. Special equipment is any item not cor
responding exactly to the descriptive informa
tion in the Aircraft Specifications. This in
cludes items such as emergency locator trans
mitter (ELT), tail or logo lights, instruments,
ashtrays, radios, navigation lights, and carpets.
a. With full fuel, determine the number of
passengers and baggage permissible.
b. With maximum passengers, determine
the fuel and baggage permissible.
c. With maximum baggage, determine
the fuel and the number and location of pas
sengers.
d. Examples of the computations for the
above items are given in figures 10-12, 10-13,
and 10-14 respectively. The above cases are
mainly applicable to the lighter type personal
aircraft. In the case of the larger type transport
aircraft, a variety of loading conditions is pos
sible and it is necessary to have a loading
schedule.
10-19. EQUIPMENT LIST. A list of the
equipment included in the certificated empty
weight may be found in either the approved
aircraft flight manual or the weight and bal
ance report. Enter into the weight and balance
d. Required and optional equipment
may be shown on the equipment list with ref
erence to the pertinent item number listed in
the applicable specifications only when they
are identical to that number item with refer
ence to description, weight, and arm given in
the specifications. Show all special equipment
items with reference to the item by name,
make, model, weight, and arm. When the arm
for such an item is not available, determine by
actual measurement.
10-20. EQUIPMENT CHANGE. The per
son making an equipment change is obligated
to make an entry on the equipment list indi
cating items added, removed, or relocated with
the date accomplished, and identify himself by
name and certificate number in the aircraft re
cords. Examples of items so affected are the
installation of extra fuel tanks, seats, and bag
gage compartments. Figure 10-15 illustrates
the effect on balance when equipment items
are added within the acceptable c.g. limits and
fore and aft of the established c.g. limits.
Page 10-14
Par 10-17