A new airworthiness directive (AD) for the Learjet 45 stems from a report of two cases of premature corrosion on the structural support flange for the engine thrust reverser. The AD requires inspecting for any corrosion, and damage to the sealant; installing sealants and gaskets; and related investigative and corrective action as necessary.
Sherwin-Williams has introduced chrome hazard-free quick-dry epoxy primer. The company says it is a high-performance, two-component corrosion-inhibitive epoxy primer that contains no chromate, dries more quickly and has a longer pot life than current paints. It provides “excellent adhesion to treated substrates,” meets U.S.
Cessna has released a video on microbiological growth in fuel tanks for all Citations. Microbes can grow wherever water accumulates in aircraft fuel tanks and systems. Only tiny quantities of water are required: a film less than 1mm thick can support microbial growth. The video shows how to inspect fuel tanks for signs of microbiological growth, fungus and possible corrosion damage.
Cessna Aircraft introduced a treatment to protect Citation jets based in Europe from the corrosive effects of potassium formate, the environmentally friendly but aluminum-hostile runway de-icer increasingly used across the region. The treatment is available under an enhancement to Cessna’s ProTech factory maintenance program, called ProTech+. The anti-corrosion procedure entails a thorough airframe inspection and application of Corban 23, a super-penetrating fluid that creates a protective barrier on the airframe.
Beringer Wheels & Brakes is offering a corrosion-resistant two-piece nosewheel for the DHC-6 Twin Otter. Designed using 3-D FEM software, it is said to stand up to severe use, including wet environments, by sealing the bearings to keep water out. “This alloy wheel is stronger and much less brittle [than the original],” said president Gilbert Beringer.
New Hampshire Ball Bearings (Booth No. N3304) has taken advantage of the opportunity at Heli-Expo ’13 to introduce its Oscimax self-lubricating liner technology to show attendees. The product, according to the company, increases the performance of complex bearing systems and assemblies such as those found in helicopters.
Dassault is studying on-board sensors to anticipate corrosion better. Current corrosion-related inspections follow a one-size-fits-all program, and the programs tend to be quite restrictive. In future, sensors could inform technicians on the actual moisture and salinity the aircraft has been subjected to. “An aircraft sitting in the Arizona desert and one operating from Singapore see different corrosion risks,” Vautey pointed out.
Bowman Plating, a chemical processing company located in Compton, Calif., was sentenced in U.S. District Court, Los Angeles, for providing false statements related to the chemical processing of aircraft parts sold to commercial aviation companies and to the Department of Defense. Bowman was ordered to pay a fine of $500,000, a special assessment of $1,200, and to serve three years of probation.
Sherwin-Williams Aerospace Coatings (Booth No. 4547), located in Andover, Kan., introduced several new products during NBAA’12. Its new urethane primer and sanding surfacer (CM0481827) can double as either a traditional sanding surfacer or as a primer. MROs and paint shops can now use one product for two purposes. And the product dries twice as fast as traditional epoxy surfacer technologies. The corrosion-inhibitive urethane primer is also chromate hazard-free and is intended for use on all aircraft.
Skyscapes, a new basecoat/clearcoat exterior paint developed by Sherwin-Williams Aerospace, now has two complete coatings, including pretreatment, corrosion protective primer, topcoat and clearcoat. Both are certified with SAE International’s Aerospace Material Specification 3095 (AMS 3095). One system includes Alodine, 483987 primer and Skyscapes basecoat/clearcoat. The second system is Alodine, 483787 chrome hazard-free primer and Skyscapes basecoat/clearcoat.
- Page 1