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Failure definition and scoring criteria |
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|  MIL-C-52972A(ME)
4.3.2.14.4
Failure definition and scoring criteria. A failure for the
purpose of this test is defined as any malfunction which the operator cannot
remedy by adjustment, repair or replacement within 30 minutes (all waiting
periods are excluded) utilizing the resources available to the parent unit when
deployed and which causes any of the following:
Failure to commence operation, cessation of operation or degradation or
a.
performance below the designated levels.
b.
Serious damage to the system.
c.
Personnel safety hazards.
d.
Air purity not as specified.
4.5.2.14.5 Test procedure . The units shall be operated continuously as
described above except that preventative maintenance checks and services shall
be made as prescribed by the equipment maintenance manuals. Only that main-
tenance established by the contractor in the maintenance schedule prior to test
start is permitted during test. Stops for such maintenance shall be recorded as.
previously described.
4.5.2.15 Maintainability.
Maintenance operations required during first
article testing shall be accomplished to determine conformance to 3.6.2. Errors
or inadequacies in the manual shall not be considered in assessing the mainte-
nance ratio.
4.5.2.15.1 Maintenance ratio. The maintenance ratio shall be computed during
first article testing. Nonconformance to 3.6.2 shall constitute failure of this
test.
4.5.2.16 Operation. Operate each compressor unit for not less than 10 hours
utilizing all operator's controls and determine capacity. Capacity may be
measured by use of a calibrated meter or bottle pump method. Air purity shall
be tested in accordance with 4.5.2.10 after initial 30 minutes, after 4 hours
and prior to completion of the 10 hour operation test. Inability of each com-
pressor unit to produce not less than 5 cfm at 3200 psi, or any malfunction,
leakage or rough or irregular operation shall constitute failure of this test.
4.5.2.17 Pendulum-impact test. The compressor shall be subjected to the
pendulum-impact test in accordance with FED-STD-101, method 5012, except the
vertical height of drop shall be 18 inches, and the compressor will be unboxed
and securely mounted to a platfom which will extend beyond the frame or any mem-
ber of the compressor on all four sides an designed to receive the full impact
of the abutment.
4.6 Inspection of packaging. The preservation, packing, and marking shall be
examined and tested in accordance with the quality assurance provisions of
MIL-C-3600 and with the special requirements of section 5 herein.
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