spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Pt. 43, App. A

(viii) Elements of an airframe including
spars, ribs, fittings, shock absorbers, bracing, cowling, fairings, and balance weights.
(ix) Hydraulic and electrical actuating system of components.
(x) Rotor blades.
(xi) Changes to the empty weight or empty
balance which result in an increase in the
maximum certificated weight or center of
gravity limits of the aircraft.
(xii) Changes to the basic design of the
fuel, oil, cooling, heating, cabin pressurization, electrical, hydraulic, de-icing, or exhaust systems.
(xiii) Changes to the wing or to fixed or
movable control surfaces which affect flutter
and vibration characteristics.
(2) Powerplant major alterations. The following alterations of a powerplant when not
listed in the engine specifications issued by
the FAA, are powerplant major alterations.
(i) Conversion of an aircraft engine from
one approved model to another, involving
any changes in compression ratio, propeller
reduction gear, impeller gear ratios or the
substitution of major engine parts which requires extensive rework and testing of the
engine.
(ii) Changes to the engine by replacing aircraft engine structural parts with parts not
supplied by the original manufacturer or
parts not specifically approved by the Administrator.
(iii) Installation of an accessory which is
not approved for the engine.
(iv) Removal of accessories that are listed
as required equipment on the aircraft or engine specification.
(v) Installation of structural parts other
than the type of parts approved for the installation.
(vi) Conversions of any sort for the purpose
of using fuel of a rating or grade other than
that listed in the engine specifications.
(3) Propeller major alterations. The following
alterations of a propeller when not authorized in the propeller specifications issued by
the FAA are propeller major alterations:
(i) Changes in blade design.
(ii) Changes in hub design.
(iii) Changes in the governor or control design.
(iv) Installation of a propeller governor or
feathering system.
(v) Installation of propeller de-icing system.
(vi) Installation of parts not approved for
the propeller.
(4) Appliance major alterations. Alterations
of the basic design not made in accordance
with recommendations of the appliance manufacturer or in accordance with an FAA Airworthiness Directive are appliance major alterations. In addition, changes in the basic
design of radio communication and navigation equipment approved under type certification or a Technical Standard Order that

have an effect on frequency stability, noise
level, sensitivity, selectivity, distortion,
spurious radiation, AVC characteristics, or
ability to meet environmental test conditions and other changes that have an effect
on the performance of the equipment are
also major alterations.
(b) Major repairs - (1) Airframe major repairs.
Repairs to the following parts of an airframe
and repairs of the following types, involving
the strengthening, reinforcing, splicing, and
manufacturing of primary structural members or their replacement, when replacement
is by fabrication such as riveting or welding,
are airframe major repairs.
(i) Box beams.
(ii) Monocoque or semimonocoque wings or
control surfaces.
(iii) Wing stringers or chord members.
(iv) Spars.
(v) Spar flanges.
(vi) Members of truss-type beams.
(vii) Thin sheet webs of beams.
(viii) Keel and chine members of boat hulls
or floats.
(ix) Corrugated sheet compression members which act as flange material of wings or
tail surfaces.
(x) Wing main ribs and compression members.
(xi) Wing or tail surface brace struts.
(xii) Engine mounts.
(xiii) Fuselage longerons.
(xiv) Members of the side truss, horizontal
truss, or bulkheads.
(xv) Main seat support braces and brackets.
(xvi) Landing gear brace struts.
(xvii) Axles.
(xviii) Wheels.
(xix) Skis, and ski pedestals.
(xx) Parts of the control system such as
control columns, pedals, shafts, brackets, or
horns.
(xxi) Repairs involving the substitution of
material.
(xxii) The repair of damaged areas in metal
or plywood stressed covering exceeding six
inches in any direction.
(xxiii) The repair of portions of skin sheets
by making additional seams.
(xxiv) The splicing of skin sheets.
(xxv) The repair of three or more adjacent
wing or control surface ribs or the leading
edge of wings and control surfaces, between
such adjacent ribs.
(xxvi) Repair of fabric covering involving
an area greater than that required to repair
two adjacent ribs.
(xxvii) Replacement of fabric on fabric covered parts such as wings, fuselages, stabilizers, and control surfaces.
(xxviii) Repairing, including rebottoming,
of removable or integral fuel tanks and oil
tanks.
(2) Powerplant major repairs. Repairs of the
following parts of an engine and repairs of

853

VerDate Sep<11>2014

12:50 Apr 30, 2019

Jkt 247046

PO 00000

Frm 00863

Fmt 8010

Sfmt 8002

Y:\SGML\247046.XXX

247046