18.104.22.168 Access. Not applicable.
22.214.171.124 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
126.96.36.199 NDI Equipment Settings.
Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19ell.
- 200 KHz
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 Figure
188.8.131.52 Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 4-36.
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.
18.104.22.168 22.214.171.124 Marking and Recording of Inspection Results. Mark and record the inspection results as required by
Backup Method. None required.
System Securing. The tail landing gear actuating cylinder, if removed, requires installation in accordance with
the applicable technical manuals listed in Table 1-1.