Appendix 2
Major Alterations, Major Repairs, and Preventive Maintenance
(a) Major alterations. Must be pre-approved by the Manufacturer and performed by an
FAA certified A&P
(1) Airframe major alterations.
(i) Wings.
(ii) Tail surfaces.
(iii) Fuselage.
(iv) Engine mount.
(v) Control system.
(vi) Landing gear.
(vii) Hull or floats.
(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) propeller blade(s).
(xi) Changes to the empty weight or empty balance which result in an
increase in the maximum approved weight or center of gravity limits of the
aircraft.
(xii) Changes to the basic design of the fuel, oil, cooling, heating, electrical,
hydraulic, 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.
(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 manufacturer.
(iii) Installation of an accessory which is not approved for the engine.
Appendix 2 July 09
Page 1
