TM 1-1520-265-232.2.5 SystemSecuring. Clean the split cones to remove inspection media. Refer to Post Cleaning and Restoration ofPart or Area After NDI, paragraph 1.4.16. The split cones require installation in accordance with the applicable technicalmanuals listed in Table 1-1.2.3FERROUS ROTOR SYSTEM BOLTS AND PINS (MT).2.3.1 Description(Figure2-1.IndexNo.3). This inspection is peculiar to all ferrous bolts and pins contained withinthe rotor system.2.3.2Defects.Defects may occur anywhere on the surface of the bolt. No cracks are allowed.2.3.3 PrimaryMethod.Magnetic Particle.2.3.3.1 NDI Equipment and Materials.(Refer to Appendix B.)a.Magnetic Particle Inspection Probe/Yokeb.Magnetometerc.Black Lightd.Fluorescent Magnetic Particles, refer to Table 1-8e.Consumable Materials, refer to Table 1-8f.Aircraft Marking Pencil, refer to Table 1-8NOTEHand-held magnetic coil may be used. Refer to paragraph 1.4.8.1.2 and Figure 1-6.2.3.3.2Preparation of Helicopter.The helicopter shall be prepared for safe ground maintenance and the bolts orpins removed in accordance with the applicable technical manuals listed in Table 1-1.2.3.3.3Access. Not applicable.2.3.3.4Preparation of Part.The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,paragraph 1.4.4.2.3.3.5NDI Equipment Settings. Refer to Magnetic Particle Method, paragraph 1.4.8.2.3.3.6Inspection Procedure.A magnetic field shall be applied to the part perpendicular to the orientation ofpossible cracks. The position required for this inspection is illustrated in Figure 2-3.Figure 2-3. Ferrous Rotor System Bolts and Pins2-6
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