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First article (initial production vehicles) |
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|  MIL-T-740G
3. REQUIREMENTS
3.1 First article (initial production vehicles). The vehicles of each model selected as first
production shall be fully representative of vehicles proposed to be furnished under the contract
with all current modifications included in and on the selected vehicles. Vehicles shall be
submitted for inspection and test to determine conformance to this specification. If submitted
vehicles meet all requirements of this specification, no modifications shall be applied to
subsequent vehicles to be produced under contract without prior approval by the Government.
The first production model of the complete vehicle shall not establish acceptance criteria for the
remainder of the vehicles under contract (see 4.3.2.1 and 6.3).
3.1.1 Reliability. Minimum acceptable value (MAV) for the vehicles shall not be less than
545 Mean Miles Between Failure (MMBF) during the first 20,000 miles (11,400 miles for
wrecker and van models) of operation. A failure for calculation of MMBF shall be defined by
the failure definition and scoring criteria for M809 series 5-ton tactical trucks as follows:
a. A failure is defined as any malfunction of the end item that requires corrective action
which cannot be deferred:
(1) Until the next schedule maintenance (exclusive of lubrication services) if
organizational maintenance is prescribed for correction, or
(2) For the remainder of its specified life before overhaul, replacement, rebuild or
salvage (as applicable) if direct or general support maintenance is prescribed for
correction.
b. Corrective action is not deferrable if the malfunction causes or would cause (if not
corrected):
(1) Inability to commence operation, cessation of operation or degradation of
performance capability of the end item below that required for the
accomplishment of its prescribed mission function, or
(2) A critical or catastrophic hazard to personnel or equipment as defined in
MIL-STD-882.
c. Any malfunction which the operator or crew (user) can remedy will not be considered
a failure provided that the repair is authorized or prescribed as an operator function
and can be accomplished within 60 minutes using only controls, tools, or spare parts
incorporated in or carried with the end item.
3.1.1.1 Reliability operation. To assure that workmanship and reliability requirements are
met during the 20,000 miles and 11,4000 miles of operation, as applicable, the vehicle with rated
payload shall be capable of operating to the following percentages:
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