TM 1-1520-253-23
3.10.3.1 NDI Equipment and Materials. (Refer to Appendix B.)
a. Fluorescent Penetrant
b. Black Light
c. Consumable Materials, refer to Table 1-8
d. Aircraft Marking Pencil, refer to Table 1-8
3.10.3.2 Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance.
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
combining transmission adapter shall be removed in accordance with the applicable technical
manuals listed in Table 1-1.
3.10.3.3 Access. Access is through combiner transmission door. See Figure 1-4 - CH-47: 23;
MH-47: 30.
3.10.3.4 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or
Area for NDI, paragraph 1.4.4.
NDI_CH/MH-47F3_10
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