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Page Title:
Failure criteria and definition. |
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|  MIL-D-70789A (AR)
c. All the individual survey control points at which
20 or more measurements were made using essentially the same
mission trajectory. Only errors exceeding the maximum (99
percent) individual error limits may be excluded from these
calculations. (Alignment accuracy at the initialization point
shall be included)
4.8.6.2.3
Failure criteria and definition.
4.8.6.2.3.1 Equipment failure and definintion. The term failure
is defined as any malfunction which causes or may cause the
system to be inoperable or to:
a. Fail to commence operation, cessation of operation
or degradation of performance below designated levels.
b.
Damage to the system if operation is continued.
Results in personnel or equipment safety hazards.
c.
A pattern failure is defined as two or more occurrences of the
same failure.
Malfunctions that require corrective action will be charged as a
failure against the DRU. The following are counted as equipment
failures:
a. A malfunction detected or corrected during the
correction of another failure, provided the failures are totally
unrelated.
b. Actual or incipient malfunctions detected during
technical inspection at termination of test.
c.
Failure
to
meet
any
accuracies
specified.
d.
Spurious BIT indicators (3.10).
The following malfunctions are not considered to be equipment
failures:
Malfunctions caused by improper operational.
a.
procedures.
b. Malfunctions caused by abuse, unspecified operating
conditions, or accidents.
c. Malfunctions resulting from failure of the vehicle
or other associated equipment unless it is determined that the
DRU contributed to the malfunction.
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