Text in force at 23-63: from 23-23, effective 1 Dec 1978.
[(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 under an approved process specification.
(b) Each new aircraft fabrication method must be substantiated by a test program.] Notice of Airworthiness Review Program No. 2; Notice No. 75-10; Issued on 02/27/75. Notice of Airworthiness Review Program No. 3; Notice No. 75-19; Issued on 05/13/75. Notice of Airworthiness Review Program No. 5; Notice No. 75-23; Issued on 05/19/75. Notice of Airworthiness Review Program No. 7; Notice No. 75-26; Issued on 06/09/75.
43 FR 50592 · Source