5.11 ENGINE COMPONENTS (PT).
5.11.1 Description (Figure 5-1. Index No. 11)
. The engine components to be inspected are the power turbine,
combustion chamber, compression housing, exhaust nozzles, and IR suppressors.
5.11.2 Defects. This inspection is to: (1) verify cracks found by visual inspection, (2) locate exact end of cracks found to
facilitate stop drilling of the crack, and (3) to make sure no cracks are present after repairs.
5.11.3 Primary Method. Fluorescent Penetrant.
18.104.22.168 NDI Equipment and Materials. (Refer to Appendix B.) Inspection equipment is listed in Table 1-7. MIL-1-25135
level 3 penetrant materials shall be selected from the approved list in Table 1-8.
22.214.171.124 Preparation of Helicopter. The helicopter shall be prepared for safe ground maintenance. A 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 engine shall be removed in accordance with the applicable
technical manuals listed in Table 1-1.
126.96.36.199 Access. Access is through access door (Figure 1-4, Items LN1 or RN1).
188.8.131.52 Preparation of Part. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
184.108.40.206 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 5-11.
220.127.116.11 Marking and Recording of Inspection Results. Mark and record the inspection results as required by paragraph
5.11.4 Backup Method. None required.
5.11.5 System Securing. Clean the inspected area to remove inspection media. Refer to Post Cleaning and Restoration
of Part or Area After NDI, paragraph 1.4.16. The engine, if removed, requires installation in accordance with the
applicable technical manuals listed in Table 1-1.