Refer to Eddy Current Method, paragraph 1.4.11. Set up on test block as follows:
Null probe on test block.
Adjust phase as required to obtain horizontal lift-off.
Move probe over all three notches in test block. Adjust gain to obtain a three block vertical signal when
probe is passed over 0.040-inch notch in test block. (See the standard instrument display shown in
Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 2-28.
Place probe on a good area in the inspection location and null. Adjust phase as required to obtain horizontal
Inspect the part.
Any signal similar to the notches in the test block is cause for rejection.
Either probe identified in paragraph 184.108.40.206 may be used depending primarily on
the ease of accessibility and user friendliness. If the probes are changed, steps
220.127.116.11 b. (1), (2), and (3) shall be repeated each time a change is made.
Marking and Recording of Inspection Results. Mark and record the inspection results as required by
Backup Method. None required.
System Securing. The tail rotor hub, if removed, requires installation in accordance with the applicable
technical manuals listed in Table 1-1.
2.29 TAIL ROTOR CLAMPS AND LOCKING PLATES (ET).
Description (Figure 2-1. Index No. 29). The tail rotor clamps and locking plates provide for attachment of
the de-icing harness.
Defects. Defects can occur anywhere on the surface of the tail rotor clamps and locking plates. No cracks
Primary Method. Eddy Current.