TM 1-1520-264-23
4.37.3.6 Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
1.3.
4.37.4
Backup Method. None required.
4.37.5
System Securing. Clean the brake system components to remove inspection media. Refer to Post Cleaning
and Restoration of Part or Area After NDI, paragraph 1.4.16. The brake system components require installation in
accordance with the applicable technical manuals listed in Table 1-1.
4.38
GENERAL HELICOPTER ATTACHING HARDWARE (MT).
4.38.1
Description (Figure 4-1 Index No. 38). This inspection is applicable to all attaching hardware contained
throughout the helicopter sections.
4.38.2
Defects. Defects can occur anywhere on the surface of any attaching hardware. No cracks are allowed.
4.38.3
Primary Method. Magnetic Particle.
4.38.3.1 NDI Equipment and Materials. (Refer to Appendix B.)
a.
Magnetic Particle Inspection Probe/Yoke
b.
Magnetometer
c.
Black Light
d.
Fluorescent Magnetic Particles, refer to Table 1-8
e.
Consumable Materials, refer to Table 1-8
f.
Aircraft Marking Pencil, refer to Table 1-8
NOTE
Hand-held magnetic coil may be used. Refer to paragraph 1.4.8.1.2 and Figure 1-6.
4.38.3.2 Preparation of Helicopter. The helicopter shall be prepared for safe g
round maintenance and the identified
hardware removed in accordance with the applicable technical manuals listed in Table 1-1.
4.38.3.3 Access. Not applicable.
4.38.3.4 Preparation of Part. The part shall be thoroughly cleaned. Refer to Preparation of Part or Area for NDI,
paragraph 1.4.4.
4.38.3.5 NDI Equipment Settings. Refer to Magnetic Particle Method, paragraph 1.4.8.
4.38.3.6 Inspection Procedure. A magnetic field shall be applied to the part perpendicular to the orientation of possible
cracks. The positions generally required for this inspection are illustrated in Figure 4-38.
4-84
