Hazards Of Unapproved Modifications - Beechcraft Musketeer Sport III A23-19 Pilot Operating Handbook

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Single Englne (Piston)
Sectlon X
Safety lnformatlon
inspections should be made most frequently under high-
corrosion-risk operating conditions, such as in areas of
excessive airborne salt concentrations (e.g., near the sea)
and in high-humidity areas (e.g., tropical regions).
lf you have purchased a used airplane, have your machanic
inspect the airplane registration records, logbooks and
maintenance records carefully. An unexplained period of
time for which the airplane has been out of service, or unex-
plained significant repairs may well indieale the airplane has
been seriously damaged in a prior accident. Have your
mechanics inspect a used airplane carefully. Take the time
to ensure that you really know what you are buying when
you buy a used airplane.
HAZARDS OF UNAPPROVED MODIFICATIONS
Many airplane modifications are approved under Supple-
mental Type Certificates (STC's). Before installing an STC
on your airplane, check to make sure that the STC does not
conflict with other STC's that have already been installed.
Because approval of an STC is obtained by the individual
STC holder based upon modification of the original type
design, it is possible for STC's to interfere with each other
when both are installed. Never install an unapproved modi-
fication of any type, however innacent the apparent modifi-
cation may seem. Always obtain proper FM approval.
Airplane owners and maintenance personnel are particularly
cautioned not to make attachments to, or otherwise modify,
seats from original certification without approval from the
FAA Engineering and Manufacturing District Office having
original certification responsibility for that make and model.
Any unapproved attachmant or modification to seat structure
may increase load tactors and metal stress which could
cause failure of seat structure at a lesser "G" force than
exhibited for original certification.
May, 1994
10-19