| Damage Classification When the existence and extent of the damage has been evaluated, it must be classified. The classifications for damage are-- - Negligible.
- Repairable by patching.
- Repairable by insertion.
- Requiring replacement.
In many instances the availability, or scarcity, of repair materials and time determines whether or not a damaged part is repaired or replaced. The paragraphs that follow describe the four classifications. Negligible Damage. Damage that does not impair the structural soundness of the member involved or that can be repaired without putting flight restrictions on the aircraft is negligible damage. Examples of negligible damage include small dents, scratches, cracks, or holes that can be repaired by smoothing, sanding, stop drilling, hammering, or other methods without additional materials. Patch-Repairable Damage. Damage that exceeds limits set for negligible damage and can be repaired by bridging it with splice material is damage repairable by patching. Splice or patch material used to make internal or riveted and bolted repairs is usually the same kind of material as the original only one gage heavier. In patch repairs, filler plates identical to the gage and material of the damaged component can be used to return the damaged part to its original contour. Damage Repairable by Insertion. Any damage that can be repaired by cutting away the damaged part, replacing it with a like portion, and securing the replacement with splices at each end is damage repairable by insertion. Damage Requiring Replacement. Generally, damage that cannot be repaired or is so severe that the time needed to repair it is not warranted is classified as damage requiring replacement. Examples are-- - A complicated part which is extensively damaged.
- The surrounding structural members or inaccessibility makes repair impractical.
- The damaged part is relatively easy to replace.
- Forged or cast fittings are damaged beyond negligible limits.
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