TM 1-1520-265-23
2.23.3.5 NDI Equipment Settings.
a.
Refer to Radiographic (X-ray) method, paragraph 1.4.10.
b.
Typical equipment settings, inspection, and exposure data are given in Figure 2-23.
2.23.3.6 Inspection Procedure. Inspect designated areas, refer to Figure 2-23 for typical fluid entrapment and source/film
placement.
a.
Position film and desired nameplate data for exposure number 1.
b.
Position X-ray tubehead for exposure number 1.
c.
Set X-ray unit to the values given in the Radiographic Inspection Data chart for exposure number 1.
d.
Make exposure number 1.
e.
Remove exposed film.
f.
Repeat inspection procedure (steps a. through e. above) for each exposure.
g.
Process and interpret film for defects as noted in paragraph 2.23.2 and as shown in Figure 2-23.
2.23.4 Backup Method. None required.
2.23.5 System Securing. The tail rotor blade shall be cleaned as necessary. Refer to Post Cleaning and Restoration of
Part or Area after NDI, paragraph 1.4.16. The tail rotor blade, if removed, requires reinstallation in accordance with the
applicable technical manual listed in Table 1-1.
2.24 TAIL ROTOR BLADE TIP CAP (ET).
2.24.1 Description (Figure 9-1. Index No.24). The tail rotor blade tip cap is riveted to the end of the tail rotor blade. The
tip cap is the access area to the blade counter weight.
2.24.2 Defects. This inspection is used to verify crack indications found visually on the tail rotor blade tip cap. No cracks
are allowed.
2.24.3 Primary Method. Eddy Current.
2.24.3.1 NDI Equipment and Materials. (Refer to Appendix B.)
a.
Eddy Current Inspection Unit
b.
Probe, straight, shielded surface, 100 KHz-500 KHz
c.
Probe, right angle, shielded surface, 100 KHz-500 KHz, 900 1/2 inch drop
d.
Cable Assembly
e.
Reference Block, three-notched aluminum (0.008, 0.020, 0.040 EDM notches)
f.
Teflon Tape, refer to Table 1-8
g.
Aircraft Marking Pencil, refer to Table 1-8
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