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Number Office Title Date
20-138D AIR-130 Airworthiness Approval of Positioning and Navigation Systems

This revision adds minor clarifications and new guidance material based on issues and questions since revision ‘C’ was published. There are several new changes such as: equipment capability versus installed limitations; clarifying database configuration versus equipment capability; adding step-down fixes to navigation databases; a new appendix for demonstrating radius to fix (RF) leg capability; and, including required navigation performance (RNP) prediction guidance for RNP authorization required approach (RNP AR APCH).

03-28-2014
20-181 AIR-130 Airworthiness Approval of Attitude Heading Reference System (AHRS) Equipment

This advisory circular (AC) supplements existing airworthiness approval guidance for attitude heading reference system (AHRS) articles approved under technical standard order (TSO)?C201, Attitude Heading Reference System, or later revisions.  TSO-C201 includes performance standards for non-gimbaled attitude, heading, and turn and slip systems. 

04-07-2014
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