220.127.116.11 NDI Equipment Settings.
Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19eII
- 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 1-7.)
18.104.22.168 Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 3-10.
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 22.214.171.124 may be used depending primarily on the ease of accessibility
and user friendliness. If the probes are changed, steps 126.96.36.199 b. (1), (2), and (3) shall be repeated each
time a change is made.
188.8.131.52 Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
Backup Method. None required.
System Securing. The intermediate gearbox centrifugal fan, if removed, requires installation in accordance
with the applicable technical manuals listed in Table 1-1.