MIL-DTL-9398D
4.4.2 Sampling plan A tests. Sampling plan A tests are in addition to the individual tests.
The manufacturer shall select the type of sampling plan (attribute, variable, or continuous) in
accordance with MIL-STD-1916. The sample size shall be selected in accordance with level I of
MIL-STD-1916. The sampling plan A tests are as follows:
a.
Individual tests (see 4.4.1)
b.
Oil leakage (see 4.5.6).
c.
Low temperature operation (see 4.5.7).
d.
High temperature operation (see 4.5.8).
e.
Vibration (see 4.5.9).
4.4.3 Sampling plan B tests. Sampling plan B tests are in addition to the individual tests
(see 4.4.1) and the sampling plan A tests (see 4.4.2). The manufacturer shall select the type of
sampling plan (attribute, variable, or continuous) in accordance with MIL-STD-1916. The sample
size shall be selected in accordance with level I of MIL-STD-1916. The sampling plan B tests are
as follows:
a.
Individual tests (see 4.4.1).
b.
Sampling plan A tests (see 4.4.2).
c.
Vibration failure (see 4.5.10).
d.
Low temperature exposure (see 4.5.11).
e.
High temperature exposure (see 4.5.12).
f.
Altitude high temperature (see 4.5.13).
g.
Acceleration (see 4.5.14).
h.
Short circuit (see 4.5.15).
i.
Overspeed and reverse operation (see 4.5.16).
j.
Endurance (see 4.5.17).
k.
Internal examination (see 4.5.21).
l.
Shaft failure (see 4.5.23).
4.5 Tests.
4.5.1 Examination of product. Each generator shall be examined externally to determine
conformance to the applicable requirements of this specification not covered by tests.
4.5.2 Dielectric strength. A potential of 500 volts (V) RMS, commercial frequency, shall
be applied between any electrical pin and metal parts of the generator case, including the electrical
connector shell, prior to grounding the C lead for a period of 5 seconds. There shall be no
breakdown of insulation.
4.5.3 Continuity and resistance. The stator windings of the generator shall be checked for
continuity between the A and B electric connector pins and between the A and B pins and the
generator frame. There shall be no evidence of discontinuity. The resistance between each pair of
pins, or pin and case, shall be measured. The resistance between each pair of pins, or pin and case,
shall be within 2.0 ohms of each other.
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