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|  MIL-H-43540C
4.4.5 End item testing. When a first article is not required, the immersion
heater shall be tested as specified in 4.5.5. Failure to pass the test shall be
cause for rejection of the immersion heater.
*
4.4.6 Packaging examination. The fully packaged end items shall be
examined for the defects listed below. The lot size shall be expressed in
units of shipping containers. The sample unit shall be one shipping container
fully packaged. The inspection level shall be S-2 and the AQL, expressed in
terms of defects per hundred units, shall be 2.5.
Defect
Examine
Omitted; incorrect; illegible; of improper
Marking (exterior
size, location, sequence, or method of
and interior)
application
Any component missing, damaged, or not as
Materials
specified
Preservative improperly applied or missing
Preservative
application
Inadequate application of components, such
Workmanship
as incomplete sealing or closure of flap,
improper taping, loose strapping, or
inadequate stapling
Bulged or distorted container
4.5 Methods of inspection.
Test coupons of the mating metals shall be joined
4.5.1 Spot weld test.
together with spot welds in the same manner as intended for the parent
components. The joint contact faces shall be' pulled apart to determine
compliance with the spot weld requirements of 3.3. Any nonconformance shall
constitute failure of this test.
4.5.2 Fuel tank test. The fuel tank shall be pressurized with air at
+
4 1/2 psig and tested with a bubble supporting film in accordance with
Method 5009 of FED-STD-101, to determine compliance with the leak requirements
of 3.3.1. Any nonconformance shall constitute failure of this test.
4.5.3 Heater body test. The immersion heater body shall be pressurized
with air at 4 + 1/2 psig and tested with a bubble supporting film in
accordance with Method 5009 of FED-STD-101 to determine compliance with the
leak requirements of 3.3.2. Any nonconformance shall constitute failure of
this test. At the completion of this test the heater body shall be thoroughly
dried.
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