Change 3 2-29
220.127.116.11 Access. Access to the pitch control rods is from the L/R 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, paragraph 1.4.4.
22.214.171.124 NDI Equipment Settings.
a. Make the following initial settings on the Eddy Current Inspection Unit, NORTEC-19eII.
- 1500 KHz
b. Refer to Eddy Current Method, paragraph 1.4.11. Set up on test block as follows:
(1) .Null probe on test block.
(2) .Adjust phase as required to obtain horizontal lift-off.
(3) .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.)
126.96.36.199 Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 2-14.
a. Place probe on a good area in the inspection location and null. Adjust phase as required to
obtain horizontal lift-off.
b. Inspect the part.
c. 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.