vmandr, unaccounted in as much as whatever may have developed prior to loss of radar contact at 03:29 may have occured at any time from the last radio TX from the aircraft at 02:48. It was only when ATC initiated a routine change of frequency TX at 03:27 that they realised there was no comm with the a/c. That doesn't mean that any problems the crew may have encountered was at that precise moment. It could have been any time after 02:48.
Last edited by Hotel Tango; 19th May 2016 at 19:00.