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|  MIL-C-38418E(AS)
Corresponding components of all control assemblies procured shall be
No gimbal binding under
between control assemblies-
interchangeable
differential pressure conditions shall occur as a result of interference
between case and gimbal should a leak develop in service.
3.5.1 Plug-in Cards - The electronic control amplifier circuitry and
electromechanical modules shall be placed on plug-in cards which shall be
removable without the use of special tools. The plug-in cards shall be keyed
and color-coded to prevent being installed in the wrong location and shall
have test points for easy maintenance-
3.5.2 Maintainability - The following maintainability requirements shall be
considered in the design of the control assembly:
a. Minimization of the complexity of maintenance tasks (for
example: calibration, adjustments, inspection, et cetera) by maximum use
of simple design which includes optimum interchangeability and use of
standardized equipment or commercial items.
b. Rapid and positive recognition of equipment malfunction or
marginal performance.
c . Rapid and positive identification of the replaceable defective
part, assembly, or components.
d. Minimum numbers and types of tools and test equipment (special
and standard) needed to perform maintenance,
and
equipments,
systems,
e l Optimum accessibility in all
components requiring maintenance, inspections, removal, or replacement.
3. 5.3 Reliability - The contract specified mean-time-between-failures
(MTBF) for the control assemblies and their components shall be as
follows based on a discrimination ratio of 2.0 at a confidence level of
80 percent:
1,350 hours
A/A24G-39 Control Assembly:
a.
2,240 hours
SBK-11A/A24G-26 Displacement Gyroscope:
b.
3,440 hours
ASK-32/A24G-39 Electronic Control Amplifier:
c.
3,440 hours
ASK-44/A24G Electronic Control Amplifier:
d.
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