Business aircraft owner/operators who upgraded their Collins Aerospace TDR-94D transponders in 2014 or earlier may not be in compliance with the FAA’s ADS-B mandate.
Anti-skid valve plug replacements are in short supply and very difficult to locate. Duncan Aviation has developed repair solutions that will eliminate the wait and be more cost-effective.
This appears to be a clear sign from the FAA that the mandate compliance date will not be pushing to the right.