Cirrus Design Corporation (CDC) Model SR22 airplanes - Exceedance of the Maximum Carbon Monoxide Level
- Published
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What to do
Operators of CDC Model SR22 airplanes should review and, if applicable, implement the modifications described in Cirrus Service Bulletin SB 2X-21-03 to eliminate the exhaust leak. If there is a delay in completing the service bulletin, operators are advised to follow the operating procedures outlined in Cirrus Service Advisory SA 08-13 to keep carbon monoxide levels within regulatory limits. No specific compliance deadline is provided.
Summary
The Special Airworthiness Information Bulletin SAIB CE-08-46 addresses a carbon monoxide exceedance issue in Cirrus Design Corporation (CDC) Model SR22 airplanes. The bulletin informs operators about a temporary exceedance of the maximum carbon monoxide level allowed by 14 CFR 23.831(a) during specific flight conditions involving the air-conditioning system. This information bulletin is advisory and not mandatory.
What changed
SAIB CE-08-46 identifies that during production flight tests, Model SR22 airplanes with air-conditioning set to Recirculation Mode and in extended climb experienced carbon monoxide levels exceeding the regulatory limit of 50 PPM, reaching up to 78 PPM. Cirrus issued Service Bulletin SB 2X-21-03 to address the issue by removing a gap allowing exhaust to enter the fuselage. The FAA does not consider this an unsafe condition requiring an airworthiness directive at this time.
Why it matters
This bulletin is important for aviation professionals because it highlights a potential health and safety concern related to carbon monoxide exposure in the cockpit during certain flight conditions. Operators and maintenance personnel need to be aware of the issue to ensure compliance with air quality standards and to maintain safe operating environments. Understanding and addressing this concern helps prevent potential carbon monoxide poisoning risks.
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