EASA SIB 2010-19: Exhaust Mufflers Inspection for piston engine Helicopters and Aeroplanes

What to do

Operators and maintenance personnel should perform daily visual inspections of exhaust system components and conduct in-depth periodic inspections according to manufacturer recommendations, typically every 100 or 200 flight hours. They should check for leaks, damage, blockages, and wear on mufflers, heat exchangers, and associated parts. Pressure testing of the exhaust system is recommended if not already specified in the aircraft maintenance program, especially after component removal or engine replacement. Use new gaskets or seals when reinstalling exhaust components.

Summary

EASA Safety Information Bulletin 2010-19 is an informational document addressing the inspection of exhaust mufflers on piston engine helicopters and aeroplanes. It highlights safety concerns related to exhaust system component failures, including mufflers and heat exchangers, which can cause carbon monoxide poisoning, engine power loss, or fire. The bulletin applies broadly to piston engine powered helicopters and aeroplanes and references related FAA SAIBs for further information.

What changed

This bulletin introduces recommendations emphasizing the importance of thorough and regular inspections of exhaust mufflers and related components on piston engine aircraft. It identifies gaps in standard maintenance manuals regarding exhaust muffler inspections and provides detailed guidance on daily and periodic inspection procedures to detect potential failures before they become critical.

Why it matters

The bulletin is important for aviation professionals because exhaust system failures can lead to severe safety hazards such as carbon monoxide poisoning, engine power loss, and fire, which have resulted in injuries in past incidents. Proper inspection and maintenance help prevent these hazards, ensuring safer operation of piston engine helicopters and aeroplanes. Maintenance organizations and operators benefit from clear guidance to enhance safety and reduce accident risk.