scope:

This specification covers phosphoric-acid base nonflammable compounds for removing corrosion from aircraft aluminum surfaces.

The phosphoric-acid base nonflammable compounds shall be of the following types and classes, as specified.

Type I - Liquid concentrate-Type I, Class 1 Type II - Dry water soluble compound or compounds in kit form. (See 6.4) Class 1 - Consist of 1 package of dry form for mixture with water. Class 2 - Consist of 2 packages of dry form for mixture with water. Class 3 - Consist of 3 packages of dry form for mixture with water.

intended Use:

The compounds covered by this specification are intended for use as corrosion removers prior to painting aluminum aircraft surfaces.