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|  MIL-T-81734D(AS)
6. 3.4 Ground supp ort equipment (GSE). GSE is defined as equipment
used by operating forces for service, maintenance, test, fault isolation,
and repair of units or components of the WCS AN/AWG-9 and is not physi-
cally a part of the WCS. It is composed of special test, special handling,
and special conditioning equipment.
6.3.5 Commercial test equipment. Commercial test equipment is defined
as test equipment listed and described in a manufacturer's catalog as a
standard item. It is built to standards of good commercial practice;
however, it is not required to meet military specifications.
6.3.6 Weapon replaceable assembly (WRA) . NRA is a generic term which
includes all the replaceable packages of an avionic equipment pod or sys-
tem as installed in an aircraft weapon system with the exception of cables,
mounting provisions, and fuse boxes or circuit breakers.
6.3.7 Shop replaceable assembly (SRA). A generic term which includes
all the packages within a test set. The term SRA includes Quick Replace-
able Assemblies (QRA) and In-Place Repairable Assemblies (IPRA).
6.3.8 Quick replaceable assembly (QRA). A preferred form of SRA which
is easily removeable from the test set without complex removal operations.
It is typified by a plug-in design.
6.3.9 In-place repairable assembly (IPRA). The least desirable form
of d having the characteristic that it is repaired in the shop while
in place in the test set.
6.3.10 Checkout. Checkout is defined as a test operation to verify
compliance with established performance standards.
6.3.11 Primary failures. Failures which occur without being the
result of associated equipment failures or through procedural errors,
are primary failures.
6.3.12 Operating life. Operating life shall exclude standby power
condition and includes only time on the elapsed time meter in the high
voltage condition.
6.3.13 MTBF. The definition of MTBF shall be in accordance with MIL-
STD-721. The determination of MTBF value includes the AN/AWG-9 items
used as "slave" units.
6.3.14 MTTR. Mean time to repair, applied herein, consists of locat-
ing a defective shop replaceable assembly (SRA), replacing that SRA with
a serviceable assembly, and performing a confidence test to verify repair.
6.4 Nomenclature cross-reference. The following is a cross reference
between the official Navy nomenclature and the major contractor part numbers.
The contractor part number suffix is controlled by the configuration list
in the contract.
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