TM 1-1520-265-23
3.12.3.3 Access. Not applicable.
3.12.3.4 Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
3.12.3.5 Inspection Procedure. Perform fluorescent penetrant inspection. Refer to Fluorescent Penetrant Method,
paragraph 1.4.7 and Table 1-5. Inspect area of concern. See Figure 3-12.
3.12.3.6 Marking and Recording of Inspection Results. Mark and record inspection results as required by paragraph 1.3.
3.12.4 Backup Method. None required.
3.12.5 System Securing. Clean the tail rotor gearbox inner/outer split cones to remove inspection media. Refer to Post
Cleaning and Restoration of Part or Area After NDI, paragraph 1.4.16. The tail rotor gearbox inner/outer split cones
require installation in accordance with the applicable technical manuals listed in Table 1-1.
Figure 3-12. Tail Rotor Gearbox Inner/Outer Split Cones
3-26
