MIL-S-62549(AT)
4.3.1.2.2 Preliminary inspection. The first production and initial production semitrailers shall be subjected to an inspection, examination and road tests by the responsible Government inspection element and Government Procuring Activity. This inspection will be a thorough and complete inspection for conformance to the requirements of the contract and specification in their entirety. Road tests shall be performed as specified in 4.5.2.
4.3.1.2.3 Vehicle disposition. After completion of inspection, the first production semitrailer shall remain at the manufacturing facility, as a production sample, and be the last vehicle of its type shipped on the contract. The semitrailer may be released sooner at the discretion of the contracting officer. The contractor shall service and maintain the semitrailer during this period in accordance with applicable documents for care and preservation while in storage. All configuration changes taking place after the first production inspection, shall be made to the first production semitrailer so that the semitrailer will be representative of the current configuration throughout the life of the contract. No configuration changes may be implemented on production vehicles after Government conditional acceptance of the first production vehicle (applicable vehicle type) without written authorization from the contracting officer.
4.3.2 Shakedown tests. Following the first production trailer inspection and road test, the trailer shall be subjected to a 2,000 mi shakedown test, by the contractor, in accordance with table IV, except that the mileage shall be 1,000 mi on hard surface and 1,000 mi on secondary roads with 900 mi of each type surface at maximum payload and 100 mi of each surface without
payload, utilizing the contractor equipment. A written test report will be submitted as per contractual requirements.
TABLE IV. IPT test profile, 6,000 mi. 1/
Course |
Mileage (mi) |
Speed (mph) 2/ |
Loading condition |
Hard-surfaced road 3/ Improved secondary road Munson gravel Churchville "C" Belgian block Off-road 4/ |
2,700 300 1,114 150 1,114 100 192 30 300 |
55 55 35 35 35 35 35 35 10 |
rated payload empty rated payload empty rated payload empty rated payload empty rated payload |
1/ IPT test to be conducted at Aberdeen proving ground.
2/ Speeds shall be up to and including values specified.
3/ Hard-surfaced road such as Perryman high speed paved.
4/ Off-road (Level to slightly hilly) such as Perryman "2".
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