MIL-DTL-3992F
4.3.1 Samples for qualification. Samples for qualification shall be representative of the products
proposed to be furnished to the Government. Samples shall be of one type and nominal size of hose
and shall be of the quantity and length specified in the applicable test method.
4.3.2 Qualification inspection routine. All samples shall be subjected to qualification testing in
accordance with table VIII the sequence is at the manufacturer's discretion.
TABLE VIII. Qualification inspection for type I (air brake) hose and hose assembly. 1/
Inspection
Qualification Inspection
Requirement paragraph
paragraph
Examination of product 2/
Hydrostatic bursting 2/
Adhesion
Ozone resistance
Oil immersion
Fungus resistance 3/
hydrostatic bursting
Proof pressure 2/
Assembly tension 2/
Elongation and contraction
High-temperature resistance
Low-temperature resistance
1/ Unless otherwise specified all tests apply to qualifying a hose assembly with previously
unqualified bulk hose.
2/ Applies to qualifying a hose assembly with already qualified bulk hose.
3/ At the discretion of the qualifying activity the manufacturer may verify conformance to 3.7.1.5
with a certificate of compliance stating testing has been completed in accordance with 4.8.2.5.
4.3.3 Acceptance of qualification inspection data. Required qualification tests at the hose assembly
level that were already performed at the bulk hose level may be eliminated if documented approval has
been obtained from the qualifying activity.
4.3.4 Failures. One or more failures shall be cause for refusal to grant qualification.
4.4 First article inspection. First article inspection shall be performed at a laboratory acceptable to the
procuring activity on sample units produced with equipment and procedures used in production. First
article inspection shall be performed on type II hoses and hose assemblies.
4.4.1 Lot records. Manufacturers shall keep lot records for 3 years minimum. Manufacturers shall
monitor for compliance to the prescribed procedures, and observe that satisfactory manufacturing
conditions and records on lots are maintained for these hose assemblies. The records, including as a
minimum, an attributes summary of all quality conformance inspections conducted on each lot, shall be
available to review by customers at all times.
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