Originally Posted by
ATC Watcher
unlikely to take off and/or enter class D airspace without a working transponder I would say , especially at night ., not to mention entering UK airspace afterwards... Only possibility is it went u/s or inadvertently turned to SBY in flight ( still happens ) But you would at least notice its departure from NTS on FR24 then.
N264DB hasn’t ever been tracked by ADS-B Exchange, who don’t filter anything.