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|  MIL-C-38418E(AS)
4.6.21 Explosion -
The
non-hermetically
assembly
sealed
control
components shall be subjected to an explosion test in accordance with
MIL-STD-81O, method 511, procedure I.
4.6.22 Shock - The control assembly components shall be subjected to a
shock test in accordance with M1L-STD-810, method 516, procedure 1,
figure 516.1-1 for flight vehicle equipment, except the shock force shall
be 15g in lieu of 20g, and procedure III. Upon completion of this test,
the components shall individual tests.
4.6.23 Acceleration - The control assembly components shall be subjected
to an acceleration test in accordance with MIL-STD-810, method 513,
procedures I and II, for airplanes and helicopters. If procedure II is
conducted on a centrifuge, the displacement gyroscope need not be
subjected to UP and DOWN accelerations. Performance tests shall not be
conducted during the acceleration but the outputs shall be monitored
during procedure II.
Upon completion of procedure 1, the control
assembly shall meet sampling plan A tests except the individual tests
need not be conducted.
Upon completion of procedure 11 testing, the
control assembly shall meet sampling plan A tests.
4.6.24 Reliability - The control assembly components shall be properly
connected as shown in figure 6 and operated to assure proper setup. The
control assemblies or the components shall be placed in test chambers
which meet the environmental cyclic conditions of test level F of
MIL-STD-781, except that the temperature extremes shall be +55C and
-44C, and vibration shall be 0.5g. After each 200 hours of equipment
operating time the components shall meet the appropriate individual tests
and the control assemblies shall meet the sampling plan A tests.
See
4.4.1.1 for accept-reject criteria.
4.6.24.1 Longevity - At the completion of the reliability test specified
in 4.6.24, three control assemblies or components shall continue to be
tested for a total of 2,000 hours each per 3.5.3.1.
4.6.24.2 Allowances and Failures - The increase in tolerances allowed
for reliability testing shall be as shown in table XXII.
out of
tolerance calibration-type requirements will only be considered as
failures if they occur in two successive cycles. Except for the above
reservations, a failure shall be as defined in 6.3.2.
81
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