TM 1-1520-253-23
4.14.3.7
Marking and Recording of Inspection Results. Mark and record as required by paragraph 1.3.
4.14.4 Backup Method. None required.
4.14.5 System Securing. If removed, the forward landing gear requires installation in accordance with the applicable
technical manuals listed in Table 1-1.
4.15.1 Description (Figure 4-1, Index No.15). There are four high-flotation landing gear assemblies, two forward and
two aft. The two forward assemblies have dual wheels. Each aft assembly has a full- swivel single wheel.
4.15.2 Defects. Defects may occur anywhere on the surface of the wheel. No cracks are allowed.
4.15.3 Primary Method. Eddy Current.
a.
Eddy Current Inspection Unit
b.
Probe, straight, shielded surface, 100 KHz-500 KHz
c.
Probe, right angle, shielded surface, 100 KHz-500 KHz, 901/2 inch drop
d.
Cable Assembly
e.
Reference Block, three-notched aluminum (0.008, 0.020, and 0.040 EDM notches)
f.
Teflon Tape, refer to Table 1-8
g.
Aircraft Marking Pencil, refer to Table 1-8
4.15.3.2
Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance and the landing
gear wheel removed and disassembled in accordance with the applicable technical manuals listed in Table 1-1.
4.15.3.3 Access.
Not applicable.
