TM 1-1520-265-23
5.22.2
Defects. This inspection is to verify cracks found by visual inspection and to ensure no cracks are
present after repairs.
5.22.3
Primary Method. Fluorescent Penetrant.
5.22.3.1
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.
5.22.3.2
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 engine shall be removed in accordance with the
applicable technical manuals listed in Table 1-1.
5.22.3.3
Access. Access is through engine cowl (Figure 1-4, Items 3T-7 or 4T-8).
5.22.3.4
Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
5.22.3.5
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 5-22.
5.22.3.6
Marking and Recording of Inspection Results. Mark and record the inspection results as required by
paragraph 1.3.
5.22.4
Backup Method. None required.
5.22.5
System Securing. Clean the inspected area to remove inspection media. Refer to Post Cleaning and
Restoration of Part or Area After NDI, paragraph 1.4.16. The engine, if removed, requires installation in accordance with
the applicable technical manuals listed in Table 1-1.
Figure 5-22. Engine Components
5-37/(5-38 blank)
