AC 150/5210-6C, dated January 28, 1985, is cancelled.
Mode of access: Internet at the FAA web site. Address as of 3/20/09: http://www.airweb.faa.gov/Regulatory%5Fand%5FGuidance%5FLibrary/rgAdvisoryCircular.nsf/0/30bef9914763386c86256edd006ce55b/$FILE/150-5210-6d.pdf; current access available via PURL.