GB/T 47374-2026Chemical oxygen generators for aviation (English PDF)

6.3 Factory Inspection

6.3.1 Each chemical oxygen generator shall undergo factory inspection and obtain a product quality inspection certificate.

6.3.2 Factory inspection items shall be carried out in accordance with

5.1 and 5.2 (unfired state). If any test fails during factory inspection, the cause should be identified, the issue corrected, and the relevant test performed again. If the requirements still cannot be met, the investigation should continue. If the result is unsatisfactory, the inspection and testing will be deemed unqualified.

6.4 Type Testing Type testing should be conducted in the following situations.

a) After the product has been identified and approved, the manufacturer will conduct its first trial production or small-batch trial production.

b) Changes in the design or process of a chemical oxygen generator may cause changes in certain characteristics and parameters.

c) The inspection results show an unacceptable deviation from the previous type test results.

d) Chemical oxygen generators produced in batches shall be subject to periodic random inspections, once a year. When the number of generators requiring inspection is too large, the inspection interval may be adjusted. Extend the period appropriately, but conduct random checks at least once every two years. For type testing, 5% of the total number of products that have passed factory inspection are randomly selected, but no fewer than 2 pieces. If any of these pieces are found to be defective, a penalty will be imposed. If a test fails, the number of samples for that test should be doubled. If the test still fails, the batch of products is considered unqualified. Type testing items should include all performance testing items specified in this document.