TM 1-1520-264-23
2.26.3.7
Marking and Recording of Inspection Results. Mark and record as required by paragraph 1.3.
NOTE
Attention shall be directed to accurately mark the boundaries of all voids. These
markings will be needed to determine acceptance or rejection criteria in
accordance with applicable technical manuals.
2.26.4
Backup Method. None required.
2.26.5
System Securing. The tail rotor blades, if removed, require installation in accordance with the applicable
technical manual listed in Table 1-1.
2.27 TAIL ROTOR BLADES (FLUID) (RT).
2.27.1
Description (Figure 2-1. Index No. 27). The tail rotor blade assemblies are rotating airfoils. The blade is
constructed with a stainless steel leading edge. Eleven aluminum honeycomb stiffeners are bonded into the spar, and
the blade skin is aluminum with bonded doublers near the root fitting.
2.27.2
Defects. Fluid in the honeycomb core.
2.27.3
Primary Method. Radiography.
Radiation Hazard
Assure compliance with all applicable safety precautions set forth in TM 55-1500-
335-23 (Nondestructive Inspection Methods manual) listed in Table 1.1. A hazard
associated with exposure to ionizing radiation is that serious injury can be inflicted
without pain, burning or other sense of discomfort during the exposure period.
Radiation protection shall be utilized in accordance with AR40-14/DLAR 1000.28.
2.27.3.1
NDI Equipment and Materials. (Refer to Appendix B.)
a.
X-ray Unit
b.
Tripod, X-ray tubehead stand
c.
Film Processor
d.
Film, Ready Pack 14 inch x 17 inch
e.
Marking Material, refer to Table 1-8
2.27.3.2
Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. Partial inspection
for cause (visual indications, sites of mechanical damage, corrosion, etc.) may be performed on all exposed surfaces of
the installed part using this procedure. If required, the tail rotor blades shall be removed in accordance with applicable
technical manuals listed in Table 1-1.
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