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 | 10-18. Loading Conditions and/or Placards
9/8/98
AC 43.13-1B
TO CHECK: MOST REARWARD WEIGHT AND BALANCE EXTREME.
GIVEN:
Actual empty weight of the aircraft -------------------------------------------------------------------------- 1169#
Empty weight center of gravity------------------------------------------------------------------------------- 10.6”
*Maximum weight---------------------------------------------------------------------------------------------- 2100#
*Rearward C.G.. limit------------------------------------------------------------------------------------------ 21.9”
*Oil capacity, 9 qts. -------------------------------------------------------------------------------------------- 17# at -49”
*Baggage, placarded do not exceed 100 lbs --------------------------------------------------------------- 100# at +75.5”
*Two passengers in rear seat, 170# x 2 --------------------------------------------------------------------- 340# at +48”
*Pilot in most rearward seat equipped with
controls (unless otherwise placarded) -----------------------------------------------------------------------170# at +16”
*Since the fuel tank is located aft of the
rearward C.G. limit full fuel must be used------------------------------------------------------------------ 240# at +22”
* Information should be obtained from the aircraft specification.
Note: If fuel tanks are located ahead of the rearward C.G. limit minimum fuel should be used.
CHECK OF REARWARD WEIGHT AND BALANCE EXTREME
Weight (#) x Arm (“) = Moment (“#)
Aircraft empty
+ 1169
+ 10.6 + 12391
Oil
+ 17
- 49
- 833
Pilot (1)
+ 170
+ 16
+ 2720
Passenger (2)
+ 340
+ 48
+ 16320
Fuel (40 gals.)
+ 240
+ 22
+ 5280
Baggage
+ 100
+ 75.5 + 7550
Total
+ 2036 (TW)
+ 43428 (TM)
Divide the TM (total moment) by the TW (total weight) to obtain the rearward weight and balance extreme.
TM = 43428 = + 21.3”
TW
2036
Since the rearward C.G. limit and the maximum weight are not exceeded, the rearward weight and balance ex
treme condition is satisfactory.
FIGURE 10-11. Example of check of most rearward weight and balance extreme.
Par 10-17
Page 10-15