BALANCE WEIGHT BRACKET (MT)

TM 1-1520-265-23 2.10 BALANCE WEIGHT BRACKET (MT). 2.10.1 Description (Figure 2-1. Index NO. 10). There are two balance weight brackets attached to each of the four spindles. The brackets provide the means of attaching the balance weights for balancing the rotor head assembly. 2.10.2 Defects. Defects may occur anywhere on the surface of the balance weight bracket. No cracks are allowed. 2.10.3 Primary Method. Magnetic Particle. 2.10.3.1 NDI Equipment and Materials . (Refer to Appendix B.) a. Magnetic Particle Inspection Probe/Yoke b. Magnetometer c. Black Light d. Fluorescent Magnetic Particles, refer to Table 1-8 e. Consumable Materials, refer to Table 1-8 f. Aircraft Marking Pencil, refer to Table 1-8 NOTE Hand-held magnetic coil may be used. Refer to paragraph 1.4.8.1.2 and Figure 1-6. 2.10.3.2 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 applicable positions of this procedure. If required, the balance weight bracket shall be removed in accordance with the applicable technical manuals listed in Table 1-1. 2.10.3.3 Access. Access to the balance weight bracket is from the UR engine cowl (Figure 1-4, Items 3T-7 and 4T- 8). 2.10.3.4 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4. 2.10.3.5 NDI Equipment Settings . Refer to Magnetic Particle Method, paragraph 1.4.8. 2.10.3.6 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 2-10. 2-19