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Page Title:
Maintainability verification (applicable to Navy and Air Force) |
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| MILT81821
4.2.4.4.1 Maintainability verification (applicable to Navy and Air Force). The Contractor
shall verify that all parts and components are identifiable in the I Illustrated Parts Breakdown and are
readily accessible for servicing and replacement, and that all maintenance repair and set-up
instructions in the MOM I are complete and valid.
4 . 2 . 4 . 4 . 2 Maintainability verification (applicable to the Army). Verification of
maintainability requirements shall be accomplished by the Contractor, who shall identify all
maintenance tasks and perform time studies on them in accordance with the following:
a.
These tasks shall be performed, in a manner representative of the
normal equipment
maintenance environment,
by following written
instructions prepared for operating personnel with a skill level equivalent to
laboratory technicians or skilled mechanics. The time to accomplish each
maintenance task shall include time for preparation, fault location,
correction of fault, and adjustment, recalibration, and final test. Time shall
be recorded in hours and decimal fractions thereof.
Maintainability shall be expressed in terms of mean active
b.
maintenance downtime as defined in MILSTD470, and as determined
herein. A period representing the service life shall be expressed in hours of
operation or cycles of operation, as appropriate. If service life is not
specified, a period of 5,000 hours shall be used. Active maintenance
downtime studies shall be made and recorded for each different maintenance
task estimated to occur during this period. The number of times each task
occurs during this period shall be recorded. This shall be done through use of
factual failure rate (reliability) data. If this factual data is not available,
estimated failure rate data shall be used. The mean active maintenance
downtime shall then be computed by adding all of the downtimes for the
period and dividing by the total number of tasks for the period.
4.2.4.5 Other tests.
Other tests such as functional tests, structural tests, environmental
tests, etc. will be performed as necessary to demonstrate compliance with applicable specifications
cited herein. These tests shalI be as described in the following subparagraphs.
Temperature measuring instruments shall be placed at
4.2.4.5.1 Temperature measuring.
critical points throughout the trainer panel, covering suspected high temperature areas. Data shall be
recorded during each cycle at the end of the period of high voltage variation indicated under the
power requirements of the related specification. The log of the data obtained should clearly identify
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