188.8.131.52 NDI Equipment Settings. Refer to Magnetic Particle Method, paragraph 1.4.8;
184.108.40.206 Inspection Procedure. A magnetic field shall be applied to the part perpendicular to the orientation of possible
cracks. Positions required for this inspection are illustrated in Figure 3-16.
Select AC on the AC/DC power switch.
Place probe/yoke on part in position 1 as shown.
Press the test switch and apply a light coat of magnetic particle media at the same time. Remove the
media momentarily before removing the current. Current should be applied for no more than five
Inspect for cracks using the black light.
Demagnetize before moving to the next position. Refer to paragraph 220.127.116.11.
Repeat steps a. through e. for positions 2 and 3.
18.104.22.168 Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
22.214.171.124 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.
Backup Method. None required.
Figure 3-16. Main Transmission Tail Rotor Drive Flange