Data collected from DA Form 2410, Component Removal/Repair/Install/Gain/Loss Record, indicates that various magnesium housings on aircraft suffer from corrosion. Corrosion on aircraft magnesium housings is a top cost driver for all airframes. Why?
Because, when repairs and touch up are required from tooling marks or damage, units are leaving off the required pretreatment known as AMS-M-3171 or Dow 19.
The corrosion problem happens in areas like:
- the main transmission housing
- input modules
- accessory modules
- intermediate gearboxes
- tail rotor gear boxes
New or rebuilt gearboxes receive special coatings, which are damaged by daily use and maintenance. Preventing corrosion on magnesium requires proper pretreatment and a finishing coat to protect the airframe against corrosion.
Preventing corrosion on magnesium requires proper pretreatment and a finishing coat to protect the airframe against corrosion. Help and guidance can be found in your specific aircraft IETM or Chapter 5-6 of TM 1-1500-344-23, Cleaning and Corrosion Control
NSN 8030-01-512-2416 (PN AMS-M-3171) brings a small prepackaged kit. Using it generates less waste. it’s easy to use and has a one year shelf life. The items in the kit are highly caustic and flammable so use it only in well-ventilated areas. Make sure the area being treated is cleaned properly and the treated component is rinsed thoroughly with water when finished. Used right, the treatment increases your aircraft’s corrosion protection, primer adhesion, and extends the component’s service life.
Of course, always protect yourself and your fellow Soldiers by following all the warnings, cautions and notes in the technical bulletins, IETMs and supplemental manuals. Always check the Safety Data Sheets—the SDS—before using any chemical and make sure you wear personal protective equipment. Every product’s SDS will list the proper equipment to wear.
For up-to-date corrosion information or assistance, visit the AMCOM Corrosion Program Office website at:
Check out Chapter 8-5 of TM 1-1500-328-23 for more corrosion information and if you have questions, call the corrosion office hotline at DSN 897-0209 or (256) 313-0209.