TM 1-1520-253-23
2.2.3.8 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.
2.2.4 Backup Method. None required.
2.2.5 System Securing. Clean the identified component(s) thoroughly to remove all residual magnetic particle media.
Refer to Post Cleaning and Restoration of Part or Area After NDI, paragraph 1.4.16. Secure the forward and aft
transmission work platforms.
2.3.1 Description (Figure 2-1. Index No.3). The hub oil tank assemblies are located on the upper side of both forward
and aft rotary-wing head assemblies, which supply lubrication to the horizontal pin bearing. The hub assemblies are
made from either magnesium or aluminum alloy.
2.3.2 Defects. Defects may occur anywhere on the surface of the hub oil tank. Any defects must be inspected both
before and after rework. No cracks are allowed.
2.3.3 Primary Method. Eddy Current.
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