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|  MIL-F-27656C(USAF)
Elements
e.
Pressure buildup and collapse
4.6.6.4
(iron E)
4.6.6.1
f . Bubble test
Element No. 4
a.
4.6.1
Examination of product
4.6.6.1
b.
Bubble test
c.
Media migration and vibration tests
4.6.6.5
4.6.6.1
d.
Bubble test
Element No. 5
a.
4.6.6.1
Bubble test
4.6.10
b.
Fluid composition test
c.
4.6.6.1
Bubble test
4.5
Acceptance test
4.5.1 Housing test. Each housing shall be subjected to the following tests:
(See paragraph 4.6.1)
a.
Examination of product
(See paragraph 4.6.2)
b.
Proof pressure test
c.
Two cycles of the differential pressure indicator
(See paragraph 4.6.4)
operation test
4.5.2 Element tests. Each element shall be subjected to the following tests:
a.
Examination of product
(See paragraph 4.6.1)
b.
Bubble test
(See paragraph 4.6.6.1)
4.6
Test methods
4.6.1 Examination of product. The filter unit shall be examined to determine compliance with the
requirements specified herein with respect to materials, workmanship, dimensions. and marking.
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