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.)
Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 4-14.
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 similarto 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
Marking and Recording of Inspection Results. Mark and record the inspection results as required by
4.14.4 Backup Method. None required.
4.14.5 System Securing. The transmissionrotor support strut assemblies, if removed, require installation in accordance
with the applicable technical manuals listed in Table 1-1.
NACELLE CARRY-THROUGH POST ASSEMBLY (ET).
4.15.1 Description (Figure 4-1, Index No. 15). The nacelle carry-through post assembly is located beneath the catwalk
center aft panel. There are two posts, left and right.
4.15.2 Defects. Defects can occur anywhere on the surface of the nacelle carry-through post assembly. No cracks are
4.15.3 Primary Method. Eddy Current.