Document ID: chunk:federal_register_of_legislation:F2006B04990:body:0:p2
Version: federal_register_of_legislation:F2006B04990
Segment Type: other
Provision Reference: 
Character Range: 3190–3816

by the placards in Paragraph 1 of this AD are adhered to.

           This airworthiness directive becomes effective on 21 January 1998.

           Background:  The FAA has received reports from Cessna about the improper installation of the identification placard on the alternate static source. The placard was installed on the valve body in a location that covers the external orifice, which is the inlet for static air reference into the valve. If these assemblies are not corrected selection of alternate static air source will cause the altimeter, airspeed and vertical speed indicators to display erroneous indications.