TM 1-1520-265-235.3.3.3Access. Location of these parts varies considerably. Refer to Figure 1-4 and Table 1-2 to locateapplicable access provisions.5.3.3.4Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.5.3.3.5Inspection Procedure. Perform fluorescent penetrant inspection. Refer to Fluorescent PenetrantMethod, paragraph 1.4.7 and Table 1-5. Inspect area of concern. See Figure 5-3.5.3.3.6Marking and Recording of Inspection Results. Mark and record the inspection results as required byparagraph 1.3.5.3.4BackupMethod. None required.5.3.5SystemSecuring.Clean the part(s) to remove inspection media. Refer to Post Cleaning andRestoration of Part or Area After NDI, paragraph 1.4.16. The part(s), if removed, requires installation in accordance withthe applicable technical manuals listed in Table 1-1.5.4 AIR INLET ASSEMBLY AND BLEED-AIR EXHAUST SLOTS (ET).5.4.1Description(Figure5-1.IndexNo.4).The aluminum air inlet assembly is at the front of the enginethrough which air is directed into the engine. The bleed air exhaust slots are in the forward inboard cone area.5.4.2Defects. This inspection is used to verify crack indications found visually on the air inlet and around thebleed air exhaust slots. No cracks are allowed.5.4.3PrimaryMethod. Eddy Current.5.4.3.1NDI Equipment and Materials. (Refer to Appendix B.)a.Eddy Current Inspection Unitb.Probe, straight, shielded surface, 100 KHz-500 KHzc.Probe, right angle, shielded surface, 100 KHz-500 KHz, 900 1/2 inch dropd.Cable Assemblye.Reference Block, three-notched aluminum (0.008, 0.020, 0.040 EDM notches)f.Teflon Tape, refer to Table 1-8g.Aircraft Marking Pencil, refer to Table 1-85.4.3.2Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance in accordancewith the applicable technical manuals listed in Table 1-1.5.4.3.35.4.3.3 Access. Not applicable.5.4.3.4Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,paragraph 1.4.4.5-5
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