Purpose

This specification details requirements and procedures for the detection of defects in aircraft and engine components during maintenance and overhaul operations.

This specification contains three appendices which provide additional guidance designed to supplement the information contained in the main body of the document. Because the guidance contained in the appendices is either subjective in nature or may have alternative acceptable approaches, it is not intended to be binding unless specifically invoked by the cognizant engineering organization (CEO), an original equipment manufacturer (OEM), or other contractual agreement. Personnel performing inspections to this specification should be familiar with the guidance and exercise good judgment if variance from this guidance is necessary. The following appendices are included:

Appendix A - Guidelines for Design, Procurement and/or Fabrication of Penetrant Systems

Appendix B - Guidelines for Assessment of Background Fluorescence

Appendix C - Processing and Inspection of Drum Rotors/Deep Well Spools and Other Complex Parts w/Limited Accessibility

Processing of parts and interpretation and evaluation of indications revealed by this inspection process shall be accomplished by qualified personnel having experience with fluorescent penetrant inspection. Qualification of personnel shall be in accordance with ATA 105, MIL-STD-410, NAS 410, EN 4179, or ASNT SNT-TC-1A.