What is a good practice concerning the inspection of heating and exhaust systems surrounded by engine exhaust jackets?

Supplementing inspections with carbon monoxide tests is considered a good practice because it helps ensure the safety and health of passengers and crew aboard the aircraft. The presence of carbon monoxide, which can come from the engine exhaust, poses a serious risk as it is a colorless and odorless gas that can lead to serious health issues if inhaled in significant quantities. While visual inspections can identify obvious physical defects or damages, they may not detect the presence of harmful gases that could be present even if all other systems look operational.

By incorporating carbon monoxide tests into the inspection routine, operators can identify potential leaks or malfunctions in the heating and exhaust systems that might not be visible. This proactive approach not only enhances safety but also adheres to regulatory requirements and best practice guidelines in aviation safety. Regular monitoring of air quality ensures that the cabin atmosphere remains safe and comfortable for everyone on board.