Airworthiness Directives; Honeywell Traffic Alert and Collision Avoidance System II Computer Units, as Installed on Various Transport Category Airplanes
airworthiness · Rule · Final rule. · Published 1994-01-05 · Effective 1994-02-04 · 59 FR 511
Document
Document number
93-32115
Federal Register citation
59 FR 511
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
1994-01-05
Effective date
1994-02-04
FAA docket
Federal Register: January 5, 1994
Abstract
This amendment adopts a new airworthiness directive (AD), applicable to all Honeywell Traffic Alert and Collision Avoidance System II (TCAS II) computer units installed on various transport category airplanes, that requires replacing certain TCAS II computer units with new units that incorporate updated collision avoidance system (CAS) logic, and modifying the computer surveillance logic. This amendment is prompted by the development of candidate enhancements to TCAS II logic that will improve its utility and increase its overall operational acceptance. The actions specified by this AD are intended to prevent collisions or near misses caused by incompatibility between the TCAS II processors and the current air traffic control system.