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MIL-DTL-25959 Tie Down, Tensioners, Cargo, AircraftThis specification covers two types of aircraft cargo tie down tensioners and excludes cargo chains. The tie down tensioners are considered to be aircraft Critical Safety Items \(CSI\). Type I \(10,000 lbs\) and Type II \(25,000 lbs\) cargo chains are governed under MIL-DTL-6458 and are procured separately from the tie down tensioners in this specification.

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MIL-DTL-25959H
TABLE II. Requirement verification matrix ­ Continued.
Verification Method
Verification
Requirement
3.9.4 Maximum service load
Examination (visual)
4.6.1 Examination of product
rating
4.6.7.4 Dynamic load test
3.9.5 Dynamic loads
Test
4.6.7.5 Dynamic impact load
3.10 Interchange
Examination
4.6.1 Examination of product
3.11 Maintenance
Examination
4.6.1 Examination of product
3.12 Workmanship
Examination (visual)
4.6.1 Examination of product
3.12.1 Bolted connections
Examination (visual)
4.6.1 Examination of product
3.12.2 Riveted connections
Examination (visual)
4.6.1 Examination of product
3.12.3 Gear and lever
Examination (visual)
4.6.1 Examination of product
assemblies
3.12.4 Cleaning
Examination (visual)
4.6.1 Examination of product
4.2 Qualification inspection. Three qualification tie down tensioners shall be subjected to the
analyses, demonstrations, examinations, and tests described in 4.6.1 through 4.6.9.  The
contractor shall provide or arrange for all test equipment and facilities. The contractor shall
submit through the contracting officer a qualification test plan per SD-6 to the Engineering
Support Authority (ESA) for approval prior to testing and a test report upon completion of
testing. The test procedure shall serve as the standard for all production testing and all tests shall
be performed in accordance with the ESA-approved test procedure.
4.3 Qualification matrix. Testing on the three test articles shall adhere to the sequence specified
in Table III.
TABLE III. Testing sequences.
Test paragraph
Test article A Test article B Test article C
4.6.4.1 High temperature storage
2
and operations test
4.6.4.2 Low temperature storage
1
and operations test
4.6.4.3 Salt fog test
2
4.6.4.4 Sand and dust test
3
4.6.4.5 Vibration test
4
4.6.6.1 Tensioning test
5
3
4.6.6.2 Release test
6
4
4.6.6.3 Manual adjustment test
1
4.6.6.4 Operations test
2
4.6.7.1 Proof load test
3
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