TM 1-1520-253-23
CAUTION
Misinterpretation of indications can result in rejectable parts being accepted and acceptable parts
being rejected. Only NDI personnel trained and qualified in accordance with applicable military
standards and technical manuals shall perform and interpret Nondestructive Inspections.
Nondestructive inspection procedures in this manual have been selected to enhance the safety of
the aircraft and personnel. Inspection procedures (including primary and backup) have been
outlined to enable NDI personnel to perform a reliable inspection of parts with respect to their
design, composition, and accessibility. In the event that a final interpretation of an indication
cannot be made, assistance from the next higher maintenance level shall be requested.
1.4.14 Equipment Used for NDI. See Table 1-7 for a summary of equipment used for NDI in this manual. Equivalent
equipment may be used unless specified otherwise in the inspection procedures.
1.4.15 Materials Used for NDI. See Table 1-8 for a summary of materials used for NDI in this manual. Common
commercial grade materials (cheesecloth, paper, etc. ) are not listed. Equivalent materials may be used unless
specified otherwise in inspection procedures.
1.4.16 Post Cleaning and Restoration of Part or Area After NDI. Upon completion of the NDI test and prior to restoration
of protective finishes, it is necessary to clean off residual inspection materials from the part. This cleaning will vary
based upon test method, contaminant, and subsequent processing of the part. In many instances, methods used for
precleaning are acceptable for post cleaning. Refer to Preparation of Part or Area for NDI, paragraph 1.4.4.
WARNING
Prolonged breathing of vapor from organic solvents, degreasers, or paint thinners is dangerous.
Use respirators in confined areas per Occupational and Environmental Health Respiratory
Protection Program (TB MED 502 (DLAM 1000. 2)). Have adequate ventilation. Avoid prolonged
skin contact. Wear rubber gloves and goggles.
a. Following all magnetic particle inspections, clean part by dipping or spraying with dry-cleaning solvent, P-D-680,
Type II or equivalent. Wipe dry with a clean, low-lint cloth, MIL-C-85043, or equivalent.
b. After post cleaning has been performed, the original protective finish or approved alternate must be restored to
the part or area by appropriate personnel. Refer to applicable technical manuals listed in Table 1-1.
