TM 1-1520-265-23a.Place probe on a good area in the inspection location and null. Adjust phase as required to obtain horizontal lift-off.b.Inspect the part.c.Any signal similar to the notches in the test block are cause for rejection.NOTEEither probe identified in paragraph 6.12.3.1 may be used depending primarily on the ease ofaccessibility and user friendliness. If the probes are changed, steps 6.12.3.5 b. (1), (2), and (3)shall be repeated each time a change is made.6.12.3.7Marking and Recording of Inspection Results. Mark and record inspection results as required by paragraph 1.3.6.12.4 BackupMethod.None required.6.12.5 SystemSecuring.The pilot collective stick bellcrank support, if removed, requires installation in accordancewith the applicable technical manuals listed in Table 1-1.6.13 PILOT/COPILOT COLLECTIVE STICK SUPPORT (ET).6.13.1 Description(Figure6-1.IndexNo.13).The pilot/copilot collective stick bellcrank support provides theattaching point for the collective control stick.6.13.2 Defects.This inspection is used to verify crack indications found visually on the pilot/copilot collective sticksupport. No cracks are allowed.6.13.3 PrimaryMethod.Eddy Current.6.13.3.1NDI Equipment and Materials. (Refer to Appendix B.)a.Eddy Current Inspection Unitb.Probe, straight, shielded surface, 100 KHz-500 KHzc.Probe, right angle, shielded surface, 100 KHz-500 KHz, 90° 1/2 inch dropd.Cable Assemblye.Reference Block, three-notched aluminum (0.008, 0.020, 0.040 EDM notches)f.Teflon Tape, refer to Table 1-8g.Aircraft Marking Pencil, refer to Table 1-86.13.3.2Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. A partial inspectionfor cause (visual indications, sites of mechanical damage, corrosion, etc.) may be performed on all exposed surfaces ofthe installed part using applicable positions of this procedure. If required, the pilot/copilot collective stick support shall beremoved in accordance with the applicable technical manuals listed in Table 1-1.6.13.3.3Access. Access is by removal of the boot and cover.6.13.3.4Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,paragraph 1.4.4.6-24
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