A037 Shock Test Extension Request

BLOCK 1-DATA ITEM NO.: A037
BLOCK 2-DATA ITEM TITLE: SHOCK TEST EXTENSION REQUEST

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BLOCK 3-DATA DESCRIPTION:

  1. The Shock Test Extension Request shall provide information to support the shock qualification for items in the basis of shock test extensions in accordance with the requirements of the contract.
  2. Where the design and service of the item is identical to that of a previously shock tested and previously approved item, or to an item which was previously approved on the basis of shock test extension, the request for approval of the item shall include the following:
    1. A copy of the original shock test and post-test reports upon which the requested extension is based. 
    2. Identification of the facility which conducted the test.
    3. A copy of the acceptance authority communication which conveyed approval of the previously extended item, if available. If not available, reference to the communication shall be provided.
    4. Certification that all applicable requirements for shock test extension in accordance with the requirements of the contract have been met.
    5. The source of any modified MIL-S-901 shock test extension criteria, if any; evidence that these criteria have been complied with; and an evaluation of the differences between these criteria and those required by the contract.
  3. Where the design or service of the item is similar, but not identical, to that of a previously shock tested and approved item, or the intended item and the intended orientation or installation differences cannot be shown to be negligible from a shock standpoint, the request for extension shall include the following:
    1. Detail drawings of the tested and untested items, and delineation of shipboard installations and orientation of the items. 
    2. A copy of the original shock test report and post-shock test reports upon which the request for extension is based.
    3. A detailed evaluation of the design, service, orientation, and installation differences compared to the requirements specified in the contract and paragraphs 4 through 7 below.
    4. Applicable military specifications and associated dates of issue for the original tested item.
    5. The source of any modified (non-MIL-S-901) shock test extension criteria, if any; evidence that these criteria have been complied with; and an evaluation of the differences between these criteria and those required by the contract.
    6. A copy of the acceptance authority communication which conveyed approval of the previously tested item, if available. If not available, reference to the communication shall be provided.
  4. The Shock Test Extension Request shall identify the following:
    1. Design and service differences between the new and previously shock tested item, including design differences introduced as a result of drawing revisions. 
    2. Differences in shape, orientation, weight, and material composition of parts or assemblies and differences in fabrication or construction. 
    3. Differences in critical clearances. 
    4. Service related differences such as rated pressure or rated torque.
    5. Drawings of the new and originally tested items marked up to point out design differences.
    6. The extent of design differences covered by the request for extension, such as range of piping support sizes, may be identified in lieu of identifying all design differences for each item as long as this allows adequate evaluation of the effect of such differences. 
  5. For each difference, or range of differences, identified in the comparisons above, a comprehensive description of the methods, assumptions, and previous shock test evidence utilized by the contractor to establish compliance with all applicable shock test extension criteria specified herein shall be furnished. 
  6. The results of engineering calculations performed in support of these requirements shall be included. Engineering assumptions attendant to these calculations shall be stated if not implicit. Sufficient information shall be provided to permit the acceptance authority to repeat or check the Supplier’s calculations. 
  7. Differences in the material composition and material properties of importance to the evaluation shall be cited.

BLOCK 4-REVIEW REQ.:

Government approval required for contract compliance. Allow 75 days for Government review and comment.

BLOCK 5-SUBMITTAL SCHEDULE:

NLT 210 DPT scheduled shock test, or 20 days after Contractor has identified that an equipment may be eligible for shock test extension, whichever is earlier.

Reference: DRL A037 21 July 2000