Airworthiness approval of traffic alert and collision avoidance systems (TCAS II) and Mode S transponders.

Bibliographic Details
Corporate Author:	United States. Federal Aviation Administration
Format:	Government Document eBook
Language:	English
Published:	[Washington, D.C.] : U.S. Dept. of Transportation, Federal Aviation Administration, [1993]
Series:	Advisory circular ; AC no. 20-131A
Subjects:	Airplanes > Collision avoidance. Air traffic control > Electronic equipment > Certification > United States.
Online Access:	https://purl.fdlp.gov/GPO/LPS104226

Description
Item Description:	"3/29/93." AC 20-131, dated October 3, 1988, is cancelled. Title from title screen (viewed Oct. 20, 2008). Electronic resource.
Physical Description:	1 volume (various pagings) : digital, PDF file.
Format:	Mode of access: Internet at the FAA web site. Address as of 10/20/08: http://www.airweb.faa.gov/Regulatory%5Fand%5FGuidance%5FLibrary/rgAdvisoryCircular.nsf/0/8C0BC1DB4C158B5E862569B600564222?OpenDocument ; current access available via PURL.