Intended Use - This equipment is to be used in aircraft carrying stores
to be released. This equipment can accurately control the rate of release, quantity to be
released and the priority and mode of release in step or ripple. An optional feature of the
system provides an instantaneous inventory of the quantity of stores remaining at any
station at any time. The equipment shall meet the performance requirement of this speci-
fication when installed in accordance with EI-458 and meets the test requirements of
Teat VaIues - Normal and limiting values of performance data shall be
determined at input voltages of 27.5 ±0.5 vdc and 115 ±1.0 vac as applicable. These data
are to be used in testing the equipment at installation points for compliance with minimum
acceptance standard of performance.
Performance Objectives - Minimum size and weight, simplicity of
operation, ease of maintenance, and an improvement in the performance and reliability of
the specific functions beyond the requirements of this specification are objectives which
shall be considered in the production of this equipment. Where it appears a substantial
reduction in size and weight or improvement in simplicity of design, performance, ease of
maintenance or reliability will result from the use of materials, parts and processes other
than those specified in Specification MIL-E-5400, it is desired their use be investigated.
When investigation shows advantages can be realized, a request for approval shall be sub-
mitted to the procuring activity for consideration. Each request shall be accompanied by
complete supporting information.
As a general rule, nonrepairable subassemblies should be encapsulated or
hermetically-sealed. The number of connections internal to the subassembly should be held
to a minimum, Detail parts tolerances and ratings should be so selected that the life of the
subassembly is greater than that of a similar repairable one. With few exceptions (such as
high voltage power supplies), the nonrepairable subassembly should evidence a mean-time-
to-failure greater than 5000 hours, and for many applications this figure must be nearer
Precedence of Documents - When the requirements of the contract, this
specification, or applicable subsidiary specifications are in conflict, the following prece-
dence shall apply:
(1) Contract - The contract shall have precedence over any specification.
(2) This Specification - This specification shall have precedence over all
applicable subsidiary specifications. Any deviation from this speci-
fication, or from subsidiary specifications where applicable, shall
be specifically approved in writing by the procuring activity.
(3) Referenced Specifications - Any referenced specification shall have
precedence over all applicable subsidiary specifications referenced
therein. All referenced specifications shall apply to the extent