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|  MIL-T-62531(AT)
APPENDIX B
40.2.1 Exclusions. Incidents which comply with the above stated definition of "system
failure" but which will not be used in the determination of system MTBF or system reliability
are:
a. Actual or incipient malfunctions detected or corrected during initial technical
inspection.
b. Actual or incipient malfunctions for which corrective action is authorized or
prescribed as an operator/crew function, and can be accomplished within 60 minutes
using only authorized controls, tools and spare parts incorporated in, or carried with,
the end item.
c. Actual or incipient malfunctions resulting from not following the prescribed
operational or maintenance procedures dictated by the equipment manuals, or which
can be directly attributed to improper replacement of components or omission of
prescribed scheduled service or inspections. This exclusion does not apply if the
malfunction is attributable to improper design of the test item, unclear instructions in
the operator/maintenance manuals, or inadequacy of any other element of the
maintenance test package.
d. Actual or incipient malfunctions resulting from test item abuse, unrealistic operating
conditions, non-valid test, or accident.
e. Malfunctions deferred to, and corrected during, the final technical inspection, except
those which caused test termination or which would have been previously considered
a system failure if an attempt had been made to operate the affected subsystem prior
to final inspection.
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