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Amplification of system failure definition |
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|  MIL-T-62531(AT)
APPENDIX B
a. Until the next scheduled maintenance (exclusive of lubrication services) if unit
maintenance is prescribed for correction or
b. For the remainder of its specified life before overhaul, replacement, rebuild or salvage
(as applicable).
40.2 Amplification of system failure definition. Diagnostic and corrective action is not
considered deferable if the malfunction caused (or would have caused if not corrected, i.e.
incipient malfunction) one of the following:
a. Inability to commence operation, cessation of operation, or reduction in performance
capability to the extent that a prescribed system function is either lost or significantly
degraded.
b. A critical or catastrophic hazard to personnel or equipment, as defined by
MIL-STD-882.
c. Prescribed unit level corrective actions deferred, or deferable, to the scheduled
maintenance, are to be accomplished without charging a system failure. Incipient
malfunctions of the end item, detected during prescribed inspections connected with a
scheduled maintenance, will also be corrected without charging a system failure,
unless higher level maintenance is prescribed for the corrective action. In this event,
a system failure will be charged if the corrective action was not deferable as described
in 40.2.1(e). A system failure will also be charged if a malfunction of a subsystem of
the end item was detected during the scheduled maintenance, that would have been
previously considered a system failure of the end item, if an attempt has been made to
operate the affected subsystem prior to the scheduled maintenance (e.g., malfunction
of a night vision device during daylight vehicle operation prior to scheduled
maintenance).
d. If an incipient malfunction of the end item was detected during the correction of
another malfunction, two system failures will be charged, proved that; the
malfunctions were totally unrelated, maintenance was performed to prevent
progression of the incipient malfunction, and both malfunctions comply with the
stated definition of "system failure". However, if the malfunctions were related (e.g.,
secondary damage caused by primary component malfunction), only the primary
malfunction will be considered a system failure.
e. When the occurrence of more than one actual malfunction is subsequently traced to a
common cause which is positively isolated, corrected by maintenance action, and
verified, only one malfunction in the series will be scored as a system failure (if
otherwise qualified). Diagnostic and unscheduled maintenance time associated with
all malfunctions will be chargeable.
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