What is a major hazard of operating reciprocating engines with exhaust leaks?

What is a major hazard of operating reciprocating engines with exhaust leaks?

• A. Hot gases can damage aircraft structure and other engine systems, and in cabin heat exchange areas carbon monoxide can enter the cabin and render occupants unconscious.
• B. Exhaust leaks are harmless at altitude.
• C. Exhaust leaks only cause a loud noise.
• D. Exhaust leaks are harmless at all altitudes.

Answer: (A)

Hot exhaust from a reciprocating engine carries high-temperature gas and, if there’s a leak, can directly damage nearby aircraft structure and engine systems. A crucial danger is that exhaust can enter the cabin through the cabin heat exchanger or other openings, delivering carbon monoxide, a colorless, odorless poison, to occupants and potentially causing unconsciousness. This risk exists regardless of altitude, so leaks are dangerous during all phases of flight, not just on the ground or at cruising height. In short, the combination of hot gas damage and CO intrusion into the cabin makes exhaust leaks a major hazard.

Hot exhaust from a reciprocating engine carries high-temperature gas and, if there’s a leak, can directly damage nearby aircraft structure and engine systems. A crucial danger is that exhaust can enter the cabin through the cabin heat exchanger or other openings, delivering carbon monoxide, a colorless, odorless poison, to occupants and potentially causing unconsciousness. This risk exists regardless of altitude, so leaks are dangerous during all phases of flight, not just on the ground or at cruising height. In short, the combination of hot gas damage and CO intrusion into the cabin makes exhaust leaks a major hazard.