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Post shock test examination and reports |
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|  MIL-G-24477(SHIPS)
APPENDIX
(k) Generator cooler covers shall be removed after each shot for Visual examina-
tion of the cooler and any excitation parts.
(l) provision shall be made for remote observation of lubricating oil pressure
to bearings and for remote shutdown of the equipment during the last shot.
(m) Additional instrumentation shall be provided by the testing activity as
required.
40.5 Post shock test examination and reports.
.
--
.
40.5.1 After completion of shock tests, the equipment shall be returned to the suppliers
plant for a complete teardown and examination for damage. Upon receipt in the suppliers
plant, prior to removal from the carrier, the equipment shall be given a visual examination
to assure that no damage has occurred during transit. The equipment shall then be removed
to the test floor area and all examination covers of all components removed and the components
shall be examined to determine tunability of the set. If the examination reveals no damage
which would prohibit full power operation, the set shall be installed on a test stand and
operated at full load for a minimum of 4 hours, Engine and electrical equipment performance
shall be monitored and recorded during the load run. All safety devices, such as overspeed
trip, low r.p.m. trip, etc., shall be tested in an appropriate manner three times to determine
if they are operating properly at the correct set point(s). Upon completion of the tests,
the set components shall be disassembled part by part, making visual examination, dimensional
checks of parts and clearances as necessary? recording damager evidence of shifting, rubbing,
momentary contacts and so forth. Piping and coolers shall be given hydrostatic tests for
evidence of any leaks.
40.5.2 A detailed report of the examination and tests shall be prepared and 5 copies
shall be submitted to the command or agency concerned for acceptance. The report shall
include:
The results of the examination and tests in detail.
(a)
Photographs to show damaged parts and relative movement of parts.
(b)
The suppliers recommendations for design improvements to "Shock harden" the
(c)
equipments.
40.6 Disposition of shock tested equipment
40.6.1 Unless otherwise specified in individual equipment specifications, shock tested
equipment will be acceptable for delivery under a contract or order provided the following
requirements are met:
All damage resulting from shock tests is corrected. The method of correction
(a)
shall be approved by the command or agency concerned.
(b) All bearings shall be replaced where examination reveals obvious but minor
damage. Where major damage to bearings is discovered, appropriate redesign
corrective action shall be taken.
(c) Any design improvements necessary to "Shock harden" are incorporated in the
unit.
(d) The reworked unit is given the duplicate unit tests of this specification
and the applicable individual equipment specification, the results are shown
to be consistent with results of tests taken on other identical units.
50.
ARRAINGEMENTS FOR SHOCK TESTING
50.1 Light weight and medium weight tests of accessory items (if used) Shock tests
utilizing the light weight weight or medium weight shock test machines may be made at any commercial
or Goverment activity having an approved test machine. The supplier shall make arrangements
for such tests direct with the activity of his choice. A list of such activities having
approved shock test machines in the area of the supplier's plant may be obtained by written
request to the command or agency concerned.
60.
MARKING
60.1 Equipment which meets the requirements specified herein shall include the follow-
ing marking on the combined-generator set installation drawing and on the detached accessory
assembly drawings:
(a) Class of shockproofness.
(b) Reference to shock test reports and acceptance letter or shock design calcula-
tions and acceptance letter.
(c) Type of mounting fixutre used.
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