StacksVerified U.S. regulatory reference

14 CFR §27.605

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)The methods of fabrication used must produce consistently sound structures. If a fabrication process (such as gluing, spot welding, or heat-treating) requires close control to reach this objective, the process must be performed according to an approved process specification.
  2. (b)Each new aircraft fabrication method must be substantiated by a test program.