TM 1-1520-265-23Change 2 4-354.14.3.1 NDI Equipment and Materials. (Refer to Appendix B.) Inspection equipment is listed inTable 1-7. AMS 2644 level 3 penetrant materials shall be selected from the approved list in Table1-8. Parts requiring flourescent penetrant inspection shall be cleaned prior to inspection withn--Propyl Bromide (vapor degreasing only)(Table 1--8), DS--108 (Table 1--8), Electron (Table 1--8),Positron (Table 1--8). DS--108, Electron, Positron must be followed by an acetone (Table 1--8) rinseor wipe: or drying until there is no visible solvent residue left on parts.4.14.3.2 Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance.A partial inspection for cause (visual indications, sites of mechanical damage, corrosion, etc.) maybe performed on all exposed surfaces of the installed part using this procedure. If required, the doorshall be removed in accordance with the applicable technical manuals listed in Table 1-1.4.14.3.3 Access. Not applicable.WARNINGMaintenance Platforms/WorkstandsUse only appropriate platforms, workstands, or other approved locally procuredstands and restraint equipment when working above 10 feet on helicopters in anontactical environment. Otherwise, personnel injury could result from accidentalfalls.4.14.3.4 Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.4.14.3.5 Inspection Procedure. Perform fluorescent penetrant inspection. Refer to FluorescentPenetrant Method, paragraph 1.4.7 and Table 1-5. Inspect area of concern. See Figure 4-14.Figure 4-14. Oil Cooler Compartment Access Door
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