TM 1-1520-253-23
3.17.3.6
Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 3-17.
a.
Place probe on part 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 is cause for rejection.
NOTE
Either probe identified in paragraph 3.17.3.1 may be used depending primarily on
the ease of accessibility and user friendliness. If the probes are changed, steps
3.17.3.5 b. (1), (2), and (3) shall be repeated each time a change is made.
3.17.3.7
Marking and Recording of Inspection Results. Mark and record as required by paragraph 1.3.
3.17.4 Backup Method. None required.
3.17.5 System Securing. If removed, the aft transmission requires installation in accordance with the applicable
technical manuals listed in Table 1-1. Secure the aft transmission work platform.
