posted on Dec, 10 2015 @ 09:14 AM
A software problem with the 787 ADS-B transponder has led to the aircraft to be blacklisted by AirNav Canada, who provide air traffic control services
in Canada. This means that certain services, such as reduced separation, are not available to the aircraft.
Australia has also blacklisted the aircraft from ground positioning services at three airports. They are reluctant to give it a full Blacklist because
that would limit the aircraft to 29,000 feet in Australian airspace.
The problem does not represent a safety issue, and new aircraft have updated software. Boeing is releasing an advisory bulletin, but it's up to the
airlines to fix the issue. It has been traced to an issue with the data packets after certain turns are made. The packets arrive with either Latitude
or Longitude but not both. This causes the transponder to briefly extrapolate where the aircraft is based on previous positions. This leads to
incorrect positions being briefly sent out. The system quickly corrects itself and displays the correct position.