When is sealing integrity verified during exhaust case checks?

• A. During mounting verification and leak testing to ensure no leakage
• B. After painting
• C. Only during final packaging
• D. There is no sealing verification

Answer: (A)

Sealing integrity is verified during mounting verification and leak testing to ensure no leakage. This step checks that all seals and gaskets are properly seated and that the exhaust case is assembled without gaps or misalignments. A controlled pressure or vacuum test reveals any leaks from seals or mating surfaces, catching issues before operating the engine. Painting can hide leaks and does not confirm the seal, while final packaging or no verification would miss potential leaks that could cause safety or performance problems.