MIL-STD-981C APPENDIX B
Rejectable Conditions:
D. Extraneous material (as described above) that is less than .010" between any two conductors or wires, shall be rejectable, regardless of size. See Figure B3 (3 of 5) and Figure B3 (4 of 5).
E. Extraneous material (as described above) that is embedded within a soft compound, such as RTV, with less than .125" between the conductors and extraneous material. See Figure B3 (3 of 5) and Figure B3 (5 of 5).
F. Any unattached wire clipping within the coil assembly. See Figure B3 (4 of 5).
B.3.1.1.2.2 Alignment and clearances - Acceptable parts shall exhibit adequate internal electrical and mechanical clearances. Criteria for determining adequate clearance by inspection of radiographs shall be established by each manufacturer and must be approved by the qualifying activity, except as specified otherwise herein. Unacceptable alignment and clearances include the following:
a. Insufficient clearance between wires and metallic case, other conductive support, or external surfaces. See Figure B-4.
b. Lead wire under tension that can be subjected to further stress under thermal expansion. See
Figure B-4(g).
c. Inadequate clearance of wires and installation holes, wherein the wires can be damaged in installation.
d. Inadequate clearance between adjacent terminals due to pigtails of the wires, or wire alignment.
e. Inadequate clearance between wires. See Figure B-4(b).
B.3.1.1.2.3. Processing damage - Unacceptable processing includes the following:
a. Raveled or frayed wire ends that can separate or pierce insulation, other wires or parts. See
Figures B-5(a) and B-6(a).
b. Partially broken wire strands. Multiple strand wire in which one or more strands have separated. See Figure B-5(b).
c. Missing or incomplete soldering or welding of connections. See Figures B-5(c) and B-6(d).
d. Excess lengths of wires that are unsupported and can move freely under mechanical or thermal stress. See Figure B-5(d).
e. Unauthorized splices or repair of broken wires or terminals. See Figures B-5(e) and B-6(c). f. Voids in encapsulant in contact with the lead between the coil and external surface that
completely surround the wire or, although not surrounding the wire, extend greater than 20 percent of the distance from the coil to the external surface. See Figure B-5(f) and (g).
g. Cracked or damaged core. See figure B-6(f).
h. Encapsulation cracks that intersect any magnet wire gauge 30 or finer.
B.3.1.1.2.4 Miscellaneous - Cracked, broken or improperly assembled core, deformed or bent parts, and voids in the seal shall be cause to reject a part.
B.3.1.2 Radio frequency coils (Family 13).
B.3.1.2.1 Views. Two views, normal to the major axis of the part shall be taken. One view shall be 90 degrees from the other.
B.3.1.2.2 Examination. The coil examination shall include, but not be limited to, inspection for extraneous material on the windings or within the enclosure, misaligned or mispositioned core, misaligned electrodes and physical damage to the windings of the coil.
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