An Airworthiness Directive (AD) was issued by the FAA (AD 2012-02-08) and by EASA (AD US-2012-02-08) against certain ACSS TCAS products. Operators of the affected ACSS TCAS Products have 36 months to comply with this AD from the effective date on March 13, 2012. March of 2015 marked the close of the compliance period. Please feel free to contact the ACSS Customer Services department for more information at (+1) 623-445-7070 or by email crc.acss@L3T.com.
More information is available by following this link to an FAQ document on this subject...