Figure 4-30. Slave M ixer Valve Parts
4.31 TAIL LANDING GEAR YOKE (ET).
4.31.1 Description (Figure 4-1, Index No. 31). The yoke assembly, attached to the tail cone
structure and the shock strut, transmits landing loads to the helicopter airframe and shock strut.
4.31.2 Defects. This inspection is used to verify crack indications found visually on the tail landing
gear yoke. Pay particular attention to areas where rework has been performed. No cracks are
4.31.3 Primary Method. Eddy Current.
220.127.116.11 NDI Equipment and Materials. (Refer to Appendix B.)
a. Eddy Current Inspection Unit
b. Probe, straight, shielded surface, 100 KHz-500 KHz
c. Probe, right angle, shielded surface, 100 KHz-500 KHz, 90_ 1/2 inch drop
d. Cable Assembly
e. Reference Block, three-notched aluminum (0.008, 0.020, 0.040 EDM notches)
f. Teflon Tape, refer to Table 1-8
g. Aircraft Marking Pencil, refer to Table 1-8