sule 6619024 M I N E R A L S P I R I T S 663 Revision 10 2025 Mineral Spirits 663 is a medium-boiling aliphatic solvent consisting primarily of C9-C12 saturated hydrocarbons withThe objective of Part 66 is to set standards, specifications, restrictions, and requirements for the issue of aircraft maintenance personnel licences and ratings under the Civil Act 2025,