Table 1-4. Penetrant Procedure (Type I, Method B)

Table 1-3. Penetrant Procedure (Type I, Method A)

Table 1-5. Penetrant Procedure-Portable or Field Application (Type I, Method C)

TM-1-1520-265-23 H-60 Helicopter Series Manual
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TM 1-1520-265-23 Table 1-4. Penetrant Procedure (Type I, Method B) Task Description a. Preparation of Part: Refer to Preparation of Part of Area for NDI, paragraph 1.4.4. b. Precleaning Procedure: Refer to TM 1-1500-344-23. c. Penetrant Application: The penetrant may be applied by brushing, spraying, or dipping. d. Penetrant Dwell: Allow a minimum of 30 minutes dwell time to a maximum of 240 minutes. Extended dwell time may require rewetting of parts. e. Emulsifier Application: The emulsifier may be applied by dipping or spraying. The preferred method of application is by dipping the part in the emulsifier. Do not permit emulsifier to remain on the part over 3 minutes. f. Rinse: Rinse the part by waterwash using a low-pressure spray (pressure not to exceed 40 PSIG) and a temperature of 16°C to 38°C (60°F to 100°F). g. Drying/Developer Operation: If a dry nonaqueous developer is to be used, first dry the part in a drying oven at a temperature not to exceed 60°C (140°F) until dry. Then apply the developer. If an aqueous developer is to be used, then submerge the part in the de- veloper solution immediately after washing. Follow by drying the part in a drying oven as mentioned above. In either case, parts shall be removed from the drying oven as soon as they are dry. h. Inspect: Perform inspection under black light. i. Materials: Type I, Method B, Level 3 or 4 (post emulsifiable-lypophilic) Penetrant (Refer to Table 1-8). 1-23

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