MIL-DTL-5578D
The samples specified above shall be selected from all cells produced at a particular plant for a
specific aircraft and approved under the same first article test and identified with the
manufacturer's same construction number. The random samples selected shall be representative
of cells submitted by the manufacturer for acceptance with respect to quality of workmanship
and the number and type of repairs.
4.3.2.3 Dissection test samples. The procuring activity shall specify whether the dissection
test is to be a periodic sampling test or a contingency option.
4.3.2.3.1 Dissection test (sampling plan). The dissection test shall be designated by the
procuring activity as a mandatory sampling test for cells incorporating newly developed
materials or manufacturing processes. For this test, cells selected at random and at a frequency
specified by the procuring activity shall be dissected in accordance with figure 1 and subjected to
the dissection test of 4.5.3.
4.3.2.3.2 Dissection test (contingency option). During cell acquisitions in which the
dissection test is not required as part of a periodic sampling plan, the procuring activity may
invoke a dissection test as a contingency option. In the event that other acceptance tests, service
use, disclosure of chronic deficiencies in materials or manufacturing processes (see 4.3.2.4), or
when questions regarding the acceptability of cells cannot be resolved by non-destructive tests, a
contingency option may be invoked. Cells selected by the procuring activity shall be dissected
as shown on figure 1 and tested as required in 4.5.3.
4.3.2.4 Inspection standards. When one item selected from production fails to meet this
specification, action shall be taken in accordance with MIL-STD-801.
4.4 Test conditions. In addition to the test conditions set forth in specific tests, the conditions
specified herein shall apply.
4.4.1 Test fluids. Fluids used in the design verification process shall include, but not be
limited to test fluids described in ASTM-D471 (Ref Fuel A and B), JP-5 and JP-8 aviation fuel,
or other test fluid as specified by the procuring activity.
4.4.2 Temperature tolerances. Unless otherwise specified, the following temperature
tolerances shall be maintained:
Above 100 °F (38 °C)--------------------- ±10 °F (+6 °C)
Below 100 °F (38 °C)--------------------- ±5 °F (+3 °C)
4.4.3 Tank mounting structure. The mounting structure shall be either the applicable portion
of the actual aircraft structure or a simulated structure. If a simulated structure is used, it shall
duplicate the shape and dimensions of the tank supporting structure in the aircraft. The preferred
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