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Acceptance Tests - The contractor shall furnish all samples and shall be
responsible for accomplishing the acceptance tests. All inspection and testing shall be under the
supervision of the Government Inspector. Contractors not having testing facilities satisfactory to
the Bureau of Aeronautics shall engage the service of a commercial testing laboratory acceptable
to the Bureau of Aeronautics. The contractor. shall furnish test reports showing quantitative re-
sults for all acceptance tests. . Such reports shall be signed by an authorized representative of the
contractor or laborator y as applicable. Acceptance or approval of material during the course of
manufacture shall not be construed as a guarantee of the acceptance of the finished product. Accept-
ance tests shall consist of the following:
(1) Individual Tests
(2) Sampling Tests
(3) Special Tests
Individual Tests - Each equipment submitted for acceptance shall be subjected
to the individual tests. These tests shall be adequate to determine compliance with the requirements
of material, workmanship, operational adequacy and reliability. As a minimum, each equipment .
accepted shall have passed the following tests:
(1) Examination of Product
(2) Operational Test
(3) Reliability Test
4.3. 1.1
Examination of Product - Each equipment shall be examined carefully to deter-
mine that the material and wor kmanship requirements of Specification MIL-E-5400 have been met.
Operational Test - Each equipment shall be operated long enough to permit the
equipment temperature to stabilize, and to check sufficient characteristics and record adequate data
to assure satisfactory equipment operation.
4.3. 1.3
Reliability Test - Each equipment shall be operated for a period of 30 hours with-
out failure, under the conditions specified herein. A failure shall be defined as anything which
causes malfunctioning of the equipment. , Only those adjustments will be permitted which can be made..
by using such controls and adjustments accessible to the operator during the normal use of the
Ambient room
Ambient room
Humidity -
Any selected frequency within the range of
Vibration (10 minutes)
20 to 30 cps (excluding resonant points) and
a minimum amplitude of + 3 g's.
The equipment shall be vibrated (without vibration isolators) for a period of 10 minutes prior to the
beginning of the 30-hour period of operation. Where feasible, the equipment shall be operated during
this vibration period for the purpose of detecting flaws and imperfect workmanship. Operation within
the specified `limits of satisfactory performance is not necessarily required during the vibration -
period. The direction of vibration should be vertical to the normal mounting plane for 5 minutes and
lateral to that plane for 5 minutes. Where it is not feasible to vibrate the equipment in 2 directions
the vertical direction shall be used. During the 30-hour period of operation following the 10-minute
vibration period, the equipment shall be mechanically cycled periodially through its various phases
of operation. Should a failure occur, it should be repaired and the test started over, except the
10-minute vibration period need not be repeated when it is certain the failure was not a result of the
vibration. Should repetitive failures occur, corrective action shall be taken to eliminate this defect
from future equipment. A record shall be kept of all failures. The. 30-hour period specified above
may be adjusted to conform with the standard working hours.

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