184.108.40.206 NDI Equipment and Materials. (Refer to Appendix B.)
Magnetic Particle Inspection Probe/Yoke
Fluorescent Magnetic Particles, refer to Table 1-8
Consumable Materials, refer to Table 1-8
Aircraft Marking Pencil, refer to Table 1-8
220.127.116.11 Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance and the main rotor
mast retaining ring removed in accordance with the applicable technical manuals listed in Table 1-1.
18.104.22.168 Access. Not applicable.
22.214.171.124 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
126.96.36.199 NDI Equipment Settings. Refer to Magnetic Particle Method, paragraph 1.4.8.
188.8.131.52 Inspection Procedure. A magnetic field shall be applied to the part perpendicular to the
orientation of possible cracks. Positions required for this inspection are illustrated in Figure 2-9.
Figure 2-9. Main Rotor Mast Retaining Ring