# AC 20-32B: Carbon Monoxide (CO) Contamination in Aircraft Detection and Prevention

- Type: Advisory circular (guidance, not mandatory unless a rule or AD requires it)
- Status: Historical
- Approved: November 24, 1972
- Last reviewed: March 26, 2020
- Family: AC 20-32
- Cancelled by: [PS-AIR-21.8-1602](https://openairdocs.org/ac/PS-AIR-21.8-1602)
- 14 CFR parts: 23
- Pages: 2
- PDF: https://openairdocs.org/files/sha256/85/f0/85f09937a5e5ce3b28da6ed2dd759e098eb07dc2685ca9b42129bad00ca5a9f3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8251F23C84B19246862569AD00777359.0001
- DRS record last changed: November 21, 2025
- Page: https://openairdocs.org/ac/20-32

## Versions

- [AC 20-32B](https://openairdocs.org/ac/20-32) (Historical), approved Nov 24, 1972, 2 pages

## Text

Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

Date: March 9, 2020 To: Neika Jones, Directives Program Manager, ASP-110 From: Dr. Michael C. Romanowski, Director, Policy and Innovation Division, Aircraft Certification Service, AIR-600 Prepared by: Pat Mullen, Manager, Small Airplane Standards Branch, AIR-690 Subject: Cancellation of Advisory Circular (AC) 20-32B, Carbon Monoxide (CO) Contamination in Aircraft—Detection and Prevention Memo No.: AIR600-20-690-GM03

This memorandum requests the cancellation of AC 20-32B, Carbon Monoxide (CO) Contamination in Aircraft—Detection and Prevention, dated November 24, 1972. The information in this AC is no longer applicable. Today, CO detectors in airplanes certificated under Title 14 Code of Federal Regulations (14 CFR) part 23, amendment 23-64, are installed using Policy Statement PS-AIR-21.8-1602, Approval of Non-Required Safety Enhancing Equipment (NORSEE) or through the type certification process.

Pursuant to the Small Airplane Revitalization Act of 20131, which was the driver for 14 CFR part 23, amendment 23-64, the FAA is developing means of compliance in partnership with industry and civil aviation authorities using industry standards that provide a more harmonized certification and safety environment. AC 23.2010-1, FAA Accepted Means of Compliance Process for 14 CFR Part 23, provides applicants a path to request the FAA to consider alternative means of compliance in lieu of an industry standard.

If you have any questions on this, please contact Mr. William Schinstock, AIR-691, at 816-329-4177.

Cc: AIR-DMO

1 Public Law 113-53, November 27, 2013.

Federal Aviation Administration Memorandum

### Page 2



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