Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Two incidents [of near mid-air collision] have occurred on Airbus A320 Family aircraft during [a] Resolution Advisory [from the] Traffic Alert and Collision Avoidance System (TCAS). One of the Human-Machine Interface (HMI) factors was the lack of visibility of relevant information on the Primary Flight Display (PFD). This condition, if not corrected, could result in erroneous interpretation of TCAS Resolution Advisories, leading to an increased risk of mid-air collision. * * * * * The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.