FAA AC 39-1:1970
FAA AC 39-1:1970 Jig Fixtures; Replacement Of Wing Attach Angles And Doublers On Douglas Dc-3 Series Aircraft, Airworthiness Directive 66-18-2 Explains methods of determining that jig fixtures used in the replacement of the subject attach angles and doublers meet the requirements of Airworthiness Directive 66-18-2.