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Engineering Design for Rework of Lightning-Protection Plating on Carbon-Composite Military Airplane Parts
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Abstract
Lightning protection plating on military airplane carbon-composite parts is a process that requires careful handling of the final product, especially during maintenance of fuel, hydraulic, and electrical systems installations. This paper and the accompanying ten-minute videotape focus on the primary reasons for having to take special precautions with lightning-protection plating (especially low plating adhesion--between 1 and 2 pounds per inch-width) and the engineering rework procedures that have been developed to return damaged plating to the original configuration specified in the engineering drawing. Some of the important features of lightning-protection plating that have contributed to the virtual elimination of plating damage cases at Boeing are: (1) the application of nickel overplating to one-third of all plated parts; (2) edge sealing with two-part epoxy adhesives; (3) fillet sealing with polysulfide sealants [MIL-S-8802 (Ref. 1) or MIL-S-81733 (Ref. 2)], and (4) the installation of elastomeric protective removable equipment (PREs) to parts that have been plated in conformance with the engineering requirements.
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Citation
Bauccio, M., "Engineering Design for Rework of Lightning-Protection Plating on Carbon-Composite Military Airplane Parts," SAE Technical Paper 951148, 1995, https://doi.org/10.4271/951148.Also In
References
- Military Specification, MIL-S-8802 Sealing Compound, Temperature-Resistant, Integral Fuel Tanks and Fuel Cell Cavities, High Adhesion 7 March 1990
- Military Specification, MIL-S-81733 Sealing and Coating Compound, Corrosion Inhibitive 13 March 1980
- Military Specification, MIL-B-5087 and Amendment 3 Bonding, Electrical and Lightning Protection, for Aerospace Use 24 December 1984
- 3 May 1985 Notice 1 17 December 1990
- Bauccio, Michael L. Qualification of a Low-Volatile Organic Chemical Solvent for Cleaning Prior to Lightning Protection Plating SAE International Technical Paper No. 931063 29th Annual Aerospace/Airline Plating & Metal Finishing Forum & Exposition Farmington, Connecticut 5 8 April 1993
- Gemmell, Vanessa Smith, Brian VOC Reduction: Solvent Cleaning and Paint Stripping SAE International Technical Paper No. 900958 26th Annual Aerospace/Airline Plating & Metal Finishing Forum & Exposition Tulsa, Oklahoma 23 26 April 1990