Inspection Procedure. Refer to Eddy Current Method, paragraph 1.4.11 and Figure 5-2.
Place probe on a good area in the inspection location and null. Adjust phase as required to obtain horizontal
Inspect the part.
Any signal similar to the notches in the test block is cause for rejection.
Either probe identified in paragraph 188.8.131.52 may be used depending primarily on the ease of accessibility
and user friendliness. If the probes are changed, steps 184.108.40.206 b. (1), (2), and (3) shall be repeated each
time a change is made.
Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
Backup Method. None required.
System Securing. The engine mounts, if removed, require installation in accordance with the applicable
technical manuals listed in Table 1-1.
5.3 FORWARD INBOARD ENGINE MOUNT (MT).
Description (Figure 5-1. Index No. 3)
. The forward inboard engine mount is attached to the forward inboard
portion of the engine main frame.
Defects. This inspection is used to verify crack indications found visually. No cracks are allowed.
Primary Method. Magnetic Particle.
NDI Equipment and Materials. (Refer to Appendix B.)
Magnetic Particle Inspection Probe/Yoke
Fluorescent Magnetic Particles, refer to Table 1-8
Consumable Materials, refer to Table 1-8
Aircraft Marking Pencil, refer to Table 1-8
Hand-held magnetic coil may be used. Refer to paragraph 220.127.116.11.2 and Figure 1-6.
Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance and the engine mount
removed in accordance with the applicable technical manuals listed in Table 1-1.