Control of Unserviceable Components

          1. Mutilation should be accomplished in such a manner that the components become
permanently unusable for their original intended use. Mutilated components should not be able to be reworked or camouflaged to provide the appearance of being serviceable, such as by re-plating, shortening and re-threading long bolts, welding, straightening, machining, cleaning, polishing, or repainting.
          2. Mutilation may be accomplished by one or a combination of the following
procedures:
                  (a) grinding,
                  (b) burning,
                  (c) removal of a major lug or other integral feature,
                  (d) permanent distortion of parts,
                  (e) cutting a hole with cutting torch or saw,
                  (f) melting,
                  (g) sawing into many small pieces,
                  (h) any other method accepted by DGCA on a case by case basis.
         3. The following procedures are examples of mutilation that are often less successful
because they may not be consistently effective:
                 (a) stamping or vibro-etching,
                 (b) spraying with paint
                 (c) small distortions, incisions or hammer marks,
                 (d) identification by tag or markings,
                 (e) drilling small holes
                 (f) sawing in two pieces only.
        4. Since manufacturers producing approved aircraft components should maintain
records of serial numbers for "retired" certified life-limited or other critical components, the organisation that mutilates a component should provide the original manufacturer with the data plate and/or serial number and final disposition of the component.
AMC M.A.504 (d) (2) Control of Unserviceable Components

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