TM 1-1520-265-23
Change 3
6-31
6.15.3.7 Marking and Recording of Inspection Results. Mark and record inspection results as
required by paragraph 1.3.
6.15.3.8 Demagnetization. With the switch remaining in the AC position, place the probe/yoke legs
in the same position used for magnetizing. Press the test switch and withdraw the probe/yoke from
the part for a distance of two feet before releasing the switch.
6.15.4 Backup Method. None required.
6.15.5 System Securing. Clean the parts thoroughly to remove all residual magnetic particle
media. Refer to Post Cleaning and Restoration of Part or Area After NDI, paragraph 1.4.16. The
connecting links, rod ends, clevises, levers, and attaching parts, if removed, require installation in
accordance with the applicable technical manuals listed in Table 1-1.
6.16 NONFERROUS CONNECTING LINKS, ROD ENDS, CLEVISES, LEVERS, AND
ATTACHING PARTS (ET).
6.16.1 Description (Figure 6-1, Index No. 16). Nonferrous connecting links, rod ends, clevises,
levers, and attaching parts are found in various locations in the helicopter flight controls.
6.16.2 Defects. This inspection is used to verify crack indications found visually on the links, rod
ends, clevises, levers, and attaching parts. No cracks are allowed.
6.16.3 Primary Method. Eddy Current.
6.16.3.1 NDI Equipment and Materials. (Refer to Appendix B.)
a. Eddy Current Inspection Unit
b. Probe, straight, shielded surface, 2 MHz (Titanium)
c. Probe, right angle, shielded surface, 2 MHz, 90_ 1/2 inch drop (Titanium)
d. Probe, Adapter
e. Cable Assembly
f. Reference Block, three-notched Aluminum (0.008, 0.020, 0.040 EDM notches)
g. Reference Block, three-notched Titanium (0.008, 0.020, 0.040 EDM notches)
h. Teflon Tape, refer to Table 1-8
i. Aircraft Marking Pencil, refer to Table 1-8
6.16.3.2 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 this procedure. If required, the links,
rod ends, clevises, levers, and attaching parts shall be removed in accordance with the applicable
technical manuals listed in Table 1-1.
6.16.3.3 Access. This is a generic inspection. Access to these parts is gained on a generic basis
in accordance with the applicable technical manuals listed in Table 1-1 and Figure 1-4.
6.16.3.4 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part
or Area for NDI, paragraph 1.4.4.
