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|  MIL-E-23457B(SHIPS)
4.
QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or
purchase order, the supplier is responsible for the performance of all inspection require-
ments as specified herein. Except as otherwise specified in the contract or order, the
supplier may use his own or any other facilities suitable for the performance of the inspec-
tion requirements specified herein, unless disapproved by the Government. The Government
reserves the right to perform any of the inspections set forth in the specification where
such inspections are deemed necessary to assure supplies and services conform to prescribed
requirements.
4.1.1 Inspection system. The supplier shall provide and maintain an inspection system
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in accordance with the data ordering document included in the contract or order (see 6.2.2) .
4.2 Classification of inspection. The inspection requirements specified herein are
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classified as follows: --
(a) First article inspection (see 4.4) .
(b) Quality conformance inspection (see 4.5).
4.3 Visual and dimensional examination. Each engine shall be subjected to a thorough
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visual and dimensional examination to ascertain that the material, workmanship, and construc-
tion are in conformance with the requirements of this specification not involing tests and
specified drawings. The examination shall apply equally to service components and repair
parts.
4.4 First article inspection. First article inspection shall be conducted on the first
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application of an engine by the command or agency concerned. Inspection shall consist of
the examination of 4.3 and tests specified in 4.4.2 through 4.4.2.12. Where a supplier has
previously conducted first article inspection in accordance with the requirements of this
specification on an identical engine, the final report covering the previous testing shall be
furnished to NAVSEC for review and certification. If the engine for which extension of
first article inspection is proposed is identical to the engine previously tested except
for the number of cylinders, rated hp and speed; or if the proposed engine has been modified
and is not part for part identical to the previously tested engine, the supplier shall
furnish a complete description of the changes, reports of testing conducted by the supplier,
and any other evidence to substantiate functional identicality. The command or agency
concerned reserves the right to require complete retesting after review of the changes,
final report of previous testing, or service experience. All testing shall be monitored by
the cognizant DCAS.
4.4.1 First unit test conditions.
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4.4.1.1 The dynamometer load for the engine shall be such as to insure that the engine
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identification plate output as specified in the contract or order can be obtained under
standard conditions. The dynamometer load necessary to satisfy this requirement shall be
determined using the following formula:
Where:
Bhp d = Dynamometer load (observed).
Bhp = Engine identification plate output.
P
=
Observed ambient pressure in inches of Hg (dry barometer) .
o
T
=
Observed ambient temperature (absolute) .
o
The correction factor shall be applied for all dynanmmeter test loads.
4.4.1.2 The exhaust back pressure at the engine exhaust outlet for rated-load and speed
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shall be adjusted to 1 inch Hg by use of an orifice or restriction in the exhaust line. The
restriction shall remain during all tests.
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