.
Dimensional inspections are required for critical parts subject to wear as specified by the applicable manuals/workscope guides. However, if visual inspection shows no indication of damage or wear, dimensional inspection requirements may be left to the judgment of inspection personnel.
.
Long life and continued efficient operation of the unit depend upon the care and accuracy with which inspections are conducted, repairs, and replacements accomplished, and calibration performed.
.
Finished part dimensions are dimensions, which define the finished part and shall be met when the part is free from external forces, except when restraint of part is specifically required by the applicable manual covering the part.
.
Dimensions and surface texture apply after plating, anodic coating, hard anodizing, metal spraying or plasma spraying has been completed.
.
Finished part dimensions apply prior to all other coatings, such as paint or dry film lubricants, unless otherwise specified by the applicable manual covering the part.
.
Table 309 provides a list of equipment and materials that may be needed for inspection.
B. General Inspection Procedures
CAUTION: AFTER INSPECTION, ALL STEEL PARTS SHALL BE COATED WITH CORROSION-PREVENTIVE COMPOUND (MIL-C-6529, TYPE III) (SECTION VII).
(1) Check instrumentation.
All micrometers, gages, indicators, other measuring instruments, or test equipment shall be checked periodically and calibrated accurately in accordance with MIL-STD-120 or with applicable manufacturer recommendations.
Inspection
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(2) Provide inspection records and tags.
Good shop practices include the compilation of complete and accurate inspection records. Such records expedite reworking of equipment, and lend assurances of a complete and thorough overhaul.
(a)
It is suggested that inspection records be based on the requirements presented in this section, and that parts requiring rework or replacement be tagged and a notation of the disposition of these parts be entered on the inspection records.
(b)
Records of rework, rework method and inspection thereof, shall be maintained in the event that such rework results in adverse conditions. Only rework procedures specified by the unit manufacturer shall be utilized. The same method is suggested for parts requiring special treatment, such as magnetic particle or fluorescent penetrant inspections, painting, cadmium plating, etc.
C. Magnetic Particle Inspection Refer to ASTM E1444.
D. Fluorescent Penetrant Inspection Refer to ASTM E1417. WARNING: USE CORRECT PERSONAL PROTECTION. OIL USED DURING THIS INSPECTION CAN CAUSE SKIN, EYE AND LUNG DAMAGE. THE ELECTRICAL CURRENT IS DANGEROUS AND COULD BURN THE SKIN.
(1)
If necessary, remove anodize or paint from the surface. Refer to Section II.
(2)
Remove all rust, scale, burrs, dirt, grease and any other contaminants. Refer to Section II.
(3)
Make sure the part is dry.
(4)
Refer to the manufacture's instructions to use fluorescent penetrant unit and penetrant oil.
NOTE: Honeywell Overhaul Facility uses ASTM E1417, Type 1, Method A, B, Sensitivity Level 3 is recommended.
(5)
When completed, remove all penetrant oil. Refer to Section II.
(6)
Apply anodize or paint, if necessary.
E. Bearing Inspection
NOTE: Functional surfaces of bearings shall be visually checked under suitable lighting at ten power magnification. Visual check may be supplemented by hand tracing with a precision stylus to determine the acceptability of observed defects.
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