Method for leakage testing of side or secondary ducts

摘要

The method involves using a truck (8), which seals a main duct (2) before and behind a secondary duct (3). A satellite camera (15) is introduced in the secondary duct, in the test chamber (17) created between the seals, and a first leakage test is carried using a gaseous medium. If the first test fails, the pressure chamber (17) is filled with a fluid medium (25), to perform a second test. This action removes the seal in the secondary duct.