TM 1-1520-265-23
a.
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.
NOTE
Either probe identified in paragraph 6.12.3.1 may be used depending primarily on the ease of
accessibility 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.
6.12.3.7 Marking and Recording of Inspection Results. Mark and record inspection results as required by paragraph 1.3.
6.12.4 Backup Method. None required.
6.12.5 System Securing. The pilot collective stick bellcrank support, if removed, requires installation in accordance
with the applicable technical manuals listed in Table 1-1.
6.13 PILOT/COPILOT COLLECTIVE STICK SUPPORT (ET).
6.13.1 Description (Figure 6-1. Index No. 13). The pilot/copilot collective stick bellcrank support provides the
attaching 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 stick
support. No cracks are allowed.
6.13.3 Primary Method. Eddy Current.
6.13.3.1 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
6.13.3.2 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 pilot/copilot collective stick support shall be
removed in accordance with the applicable technical manuals listed in Table 1-1.
6.13.3.3 Access. Access is by removal of the boot and cover.
6.13.3.4 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
paragraph 1.4.4.
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