[Federal Register Volume 61, Number 235 (Thursday, December 5, 1996)]
[Notices]
[Page 64562]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-31001]


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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration


Advisory Circular 25-20, Pressurization, Ventilation and Oxygen 
Systems Assessment for Subsonic Flight Including High Altitude 
Operation

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of issuance of advisory circular.

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SUMMARY: This notice announces the issuance of Advisory Circular (AC) 
25-20, Pressurization, Ventilation and Oxygen Systems Assessment for 
Subsonic Flight Including High Altitude Operation. This AC sets forth 
guidance on methods of compliance with the requirements of part 25 of 
the Federal Aviation Regulations (FAR) pertaining to pressurization, 
ventilation, and oxygen systems, especially as they pertain to high 
altitude subsonic flight. As with all AC material, it is not mandatory 
and does not constitute a regulation. The applicant may elect to follow 
alternate methods provided that these methods are also found by the FAA 
to be an acceptable means of complying with the requirements of part 
25.

DATES: Advisory Circular 25-20 was issued by the Manager, Transport 
Airplane Directorate, Aircraft Certification Service, ANM-100, on 
September 10, 1996.

HOW TO OBTAIN COPIES: A copy may be obtained by writing to the U.S. 
Department of Transportation, Subsequent Distribution Office, DOT 
Warehouse, SVC-121.23,3341Q 75th Ave., Landover, MD 20785, telephone 
301-322-5377, or faxing your request to the warehouse at 301-386-5394.

    Issued in Renton, Washington, on November 25, 1996.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service, ANM-100.
[FR Doc. 96-31001 Filed 12-4-96; 8:45 am]
BILLING CODE 4910-13-M