The Aircraft Weight and Balance Handbook has been prepared in
recognition of the importance of weight and balance technology in
conducting safe and efficient flight. The objective of this handbook is
twofold: to provide the airframe and powerplant mechanic (A&P) with
the method of determining the empty weight and empty weight center of
gravity (EWCG) of an aircraft and to furnish the flight crew with
information on loading and operating the aircraft to ensure its weight
is within the allowable limit and the center of gravity (CG) is within
the allowable range.
Any time there is a conflict between the
information in this handbook and specific information issued by an
aircraft manufacturer, the manufacturer’s data takes precedence over
information in this handbook. Occasionally, the word “must” or similar
language is used where the desired action is deemed critical. The use of
such language is not intended to add to, interpret, or relieve a duty
imposed by Title 14 of the Code of Federal Regulations (14 CFR).
Introduction
This
handbook begins with the basic principle of aircraft weight and balance
control, emphasizing its importance and including examples of
documentation furnished by the aircraft manufacturer and by the FAA to
ensure the aircraft weight and balance records contain the proper data.
Procedures
for the preparation and the actual weighing of an aircraft are
described, as are the methods of determining the location of the empty
weight center of gravity (EWCG) relative to both the datum and the mean
aerodynamic chord (MAC).
Loading computations for general
aviation aircraft are discussed using both loading graphs and tables of
weight and moment indexes.
Information is included that allows an
FAA-certifi ated mechanic or repairman to determine the weight and
center of gravity (CG) changes caused by repairs and alterations or
removal and installation of equipment. This includes instructions for
conducting adverse-loaded CG checks, also explaining the way to
determine the amount and location of ballast needed to bring the CG
within allowable limits.
The unique requirements for helicopter
weight and balance control are discussed, including the determination of
lateral CG and the way both lateral and longitudinal CG change as fuel
is consumed.
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