# Proposed AD FAA-2008-0284: Cirrus Design Corporation Model SR20 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-11-18
- Products: Cirrus Design
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 12, 2008, 73 FR 13157
- Comments due: May 12, 2008
- Became: [AD 2008-11-18](https://openairdocs.org/ad/2008-11-18)
- Docket: FAA-2008-0284 (https://www.regulations.gov/docket/FAA-2008-0284, where comments are filed)
- Project: 2008-CE-006-AD
- FR document: E8-4864
- Official PDF: https://openairdocs.org/files/sha256/f1/36/f136a8503f32b1cd747a5278fb836f0756ff7a984b90df9b6cfe9be335fbcc20 (from https://www.govinfo.gov/content/pkg/FR-2008-03-12/pdf/E8-4864.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/03/12/E8-4864/airworthiness-directives-cirrus-design-corporation-model-sr20-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DCC23DB4BDBE41578625740C0048E065.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0284

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Cirrus Design Corporation (CDC) Model SR20 airplanes. This proposed AD would require an inspection and replacement as necessary of the heat exchanger. This proposed AD results from the discovery of engine exhaust fumes in the cabin of CDC Model SR20 airplanes. We are proposing this AD to detect and correct leaks in the exhaust system, which could result in exhaust gases leaking into the cabin heating system. This condition could lead to carbon monoxide in the cabin and incapacitation of the pilot.

## Notices in this docket

- Mar 12, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-4864, comments due May 12, 2008 (https://www.federalregister.gov/documents/2008/03/12/E8-4864/airworthiness-directives-cirrus-design-corporation-model-sr20-airplanes)

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