MIL-PRF-914C
APPENDIX A
A.3.2 Sample. A sample consisting of 287 (ER) sample units of each resistance value (lowest, highest, and critical
or nearest to critical value) (see table A-I) and in each style, characteristic, resistance tolerance, and schematic for
which qualification is sought shall be submitted and subjected to the test of table XII. (NOTE: If fungus testing is
certified, only 277 (ER) sample units are required.) For group II 5 samples of any resistance value shall be tested.
For group III, 12 samples of any resistance value shall be tested. For group IVA, 8 samples of any resistance value
shall be tested. For group IV, group V, group VI, group VII and group VIII, samples of resistance values shall be
selected in accordance with table XII (e.g., group IV; 10 high, 10 critical, 10 low). To qualify a resistance range after
initial qualification, the range extension at higher or lower values will be qualified by supplemental testing of the new
highest or lowest value in accordance with the following: Submit 84 additional samples of new resistance value to be
qualified to group I and group IA of table XII; of this group, 10 samples to group IV, 10 samples to group V, 10
samples to group VI, 34 samples to group VII, 10 samples to group VIII, 10 samples to group IX. An additional
sample submission is required under the following conditions:
a.
Qualification to closer tolerance than submitted above is desired:
Submit
10 high value
30 additional samples of the closer
10 critical value
tolerance to be qualified to group I.
10 low value
b.
Qualification to "J" or "S" schematics by schematic A, B, C, M, P, E, or W submission is desired:
Submit:
50 additional samples of schematic
50 critical or
"J" or "S" all to group I, and
closest to critical
10 each to group IV, group V, group
value
VII, group VIII and group IX.
c.
To obtain characteristic C in the original qualification, an additional 38 units of the critical value only shall be
submitted to all of group I of table XII testing, 8 units to group IVA and 10 units each to group IV, group V,
and group VI.
After qualification has been granted, no changes shall be made in materials, design, or construction without proper
notification to the qualifying activity.
A.4 EXTENT OF QUALIFICATION
A.4.1 Extension of qualification. The resistance range included in the qualification of any one network style will be
between the lowest and highest resistance values which pass the qualification inspection (see 3.1). Qualification of
one characteristic is basis for qualification of another characteristic as indicated in table A-II. Qualification of the
lower resistance tolerances will qualify for the higher resistance tolerances in accordance with table A-III. Extent of
qualification by style shall be in accordance with A-IV. Extent of qualification by schematic shall be in accordance
with table A-V. As a requisite for extension of qualification as described herein between characteristics, tolerances,
schematics, and resistance values, the product involved must be manufactured using the same facilities, processes,
and materials as the product originally submitted for qualification.
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