TM 1-1520-264-23
5.9.3.1
NDI Equipment and Materials. (Refer to Appendix B.) Inspection equipment is listed in Table 1-7. MIL-1-25135
level 3 penetrant materials shall be selected from the approved list in Table 1-8.
5.9.3.2
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.) may be performed on all exposed surfaces of
the installed part using this procedure. If required, the shroud shall be removed in accordance with the applicable
technical manuals listed in Table 1-1.
5.9.3.3
Access. Access is through access doors (Figure 1-4, Items LN1 or RN1).
5.9.3.4
Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
5.9.3.5
Inspection Procedure. Perform fluorescent penetrant inspection. Refer to Fluorescent Penetrant Method,
paragraph 1.4.7 and Table 1-5. Inspect area of concern. See Figure 5-9.
5.9.3.6
Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
1.3.
5.9.4
Backup Method. None required.
5.9.5
System Securing. Clean the shroud to remove inspection media. Refer to Post Cleaning and Restoration of
Part or Area After NDI, paragraph 1.4.16. The shroud, if removed, requires installation in accordance with the applicable
technical manuals listed in Table 1-1.
Figure 5-9. Engine Shroud
5-17
