MIL-DTL-11891G(AT)
that continue to fail to match or exceed the data requirements established during qualification
testing may be cause for removal of the contractor from the QPL. For those contractors who are
on the QPL, but have been out of production for 1 (one) year or more, the Government reserves
the right to require a first article inspection (see 4.4).
4.4 First article inspection.
4.4.1 First article sample. Unless otherwise specified (see 6.2 and 6.10), the Government
shall select bushing and roadwheel path and ground pad samples produced under the production
contract for first article inspection. For bushings, first article samples shall be inspected as
specified in table III. For track roadwheel path and ground path, first article samples shall be
inspected to table IV. Inspection results shall be equal or superior to those obtained during
qualification testing.
4.4.2 First article sample approval. Approval of the first article sample by the
Government shall not relieve the contractor of his obligation to supply bushings, roadwheel path
or ground pad items that are fully representative of those inspected as a first article sample. Any
changes or deviations of the production units from the first article sample shall be subject to the
approval of the contracting officer.
4.4.3 Failure. Deficiencies occurring during or as a result of first article inspection shall
be cause for rejection of the products until evidence has been provided by the contractor that
corrective action has been taken to eliminate the deficiency. The Government will not accept
products until first article inspection is completed to the satisfaction of the Government. Further,
the Government reserves the right to remove a contractor's name from the QPL pending
successful completion of the first article.
4.5 Product and process control.
4.5.1 Control plan. The control plan is basically an outline of how the contractor verifies
fulfillment of the requirements of this specification. The control plan shall summarize the control
techniques used from receipt of raw materials to shipment of product. Test/inspection
characteristic values shall be identified in the Process Fingerprint Plan (see 3.3). The initial
control plan shall be established prior to qualification and shall reflect the product and process
controls used to manufacture the qualification hardware. The control plan shall be in chart form
and shall reflect the following: supplier name, process or product name and/or number, plan
revision and revision date, operation number or process step, process parameters and product
characteristics, method of control (e.g. gage, test, etc), sample size and frequency, analysis
method (e.g. control chart, lot plot, run chart, etc), and other important control information. The
control plan shall address the test methods/equipment used to meet the requirements of this
specification. The use of alternative test methods/equipment (state-of-the-art) may be utilized
provided supporting data/rationale is provided to show equivalency to the test/equipment being
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