220.127.116.11 Access. Access to the bifilar vibration absorber is from the UR engine cowl (Figure 1-4, Items 3T-7 and 4T-8).
18.104.22.168 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
22.214.171.124 NDI Equipment Settings.
Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19e11.
- 200 KHz
Probe drive - mid
Refer to Eddy Current Method, paragraph 1.4.11. Set up on test block as follows:
Null probe on test block.
Adjust phase as requiredto 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
126.96.36.199 Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 2-17.
Place probe on a good area in the inspection location and null. Adjust phase as required to obtain horizontal lift-
Inspect the part.
Any signal similar to the notches in the test block are cause for rejection.
Either probe identified in paragraph 188.8.131.52 may be used depending primarily on the ease of
accessibility and user friendliness. If the probes are changed, steps 184.108.40.206 b. (1), (2), and (3)
shall be repeated each time a change is made.