TM 1-1520-265-23
Figure 6-17. Swashplate Links
6.17.3.7 Marking and Recording of Inspection Results. Mark and record inspection results as required by paragraph 1.3.
6.17.3.8 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.
6.17.4 Backup Method. None required.
6.17.5 System Securing. Clean the swashplate links 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 swashplate links, if removed, require
installation in accordance with the applicable technical manuals listed in Table 1-1.
6.18 WALKING BEAM (MT).
6.18.1 Description (Figure 6-1. Index No. 18). The walking beam is a straight bellcrank mounted on the forward
bridge support. It transmits flight control inputs from the aft longitudinal servo to the main rotor swashplate via a
connecting linkage. It is machined from a 4340 steel forging, cadmium plated, and protected by epoxy primer and
polyurethane paint.
6.18.2 Defects. This inspection is used to verify crack indications found visually on the walking beam. Inspect all
reworked areas for cracks. Inspect walking beam lugs and surface areas for cracks. Visually inspect walking beam
flanged pivot bushing for cracks. No cracks are allowed.
6.18.3 Primary Method. Magnetic Particle.
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