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ATC agencies 'blacklist' 787 over position-data flaw
Most of the Boeing 787s delivered to date contain a software defect that, in at least five identified aircraft, have erroneously reported their location to controllers, prompting two air traffic management agencies to put the Dreamliner on a “blacklist” for certain services. (www.flightglobal.com) さらに...
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With the PLANE SPOTTERS and GENERAL PUBLIC, being able to outfit their various locations with radar reporting devices for tracking, I have seen this with numerous aircraft ... Not just the 787. FR24 has shown aircraft in one area, while FA has it in another and more often correct location.
There ya go, Jack370 and Clement Roberts. 2 comments about the same problem within 24 hours . Maybe both of you need to mention the issue to somebody at FAA? NTSB?
My guess would be NTSB since the issues with 787 are in international airspace.
WWPS?
My guess would be NTSB since the issues with 787 are in international airspace.
WWPS?
One would think that this is a huge embarrassment to Boeing. Luckily for them it hasn't been "front page news" so far.
It seems that this may expose a flaw in the ground based flight controller's software and not just the transponder's fault regarding displaying false position data.
It seems that this may expose a flaw in the ground based flight controller's software and not just the transponder's fault regarding displaying false position data.
Those may be two different things. MLAT is a committee consensus that the a/c is 'here', which depends on the quality of data submitted by the committee members and may have sporadic reception. ADSB is the a/c saying I am 'here', which I think would be more authoritative unless it is spewing garbage- which this thread seems to be about.
Joel: It appears that more than one person has come up against this or related issues. Maybe we can't see the trees because of the forest?
Personally, I've never trusted a committee to get anything right, whether it's a machine or people.
Personally, I've never trusted a committee to get anything right, whether it's a machine or people.
There's not much doubt that there is a flaw in the 787's transponders software that allows sending out coordinates that have missing parameters. That needs to be fixed as soon as possible.
The issue that I'm concerned about is that it's most likely the controllers computers that are extrapolating missing data. If that's the case, the algo should flag the aircraft as "extrapolated" and not just report a false position.
The FR24 network has a lot of ADBS contributors that are not necessarily accurate or reliable but the app does show how that can happen. The ATC controllers are not using the FR24 free ADS-B feeds so their data is much more reliable. This issue probably only shows up to ATC with the rare occasion that the airborne transmitter has a real problem.
The issue that I'm concerned about is that it's most likely the controllers computers that are extrapolating missing data. If that's the case, the algo should flag the aircraft as "extrapolated" and not just report a false position.
The FR24 network has a lot of ADBS contributors that are not necessarily accurate or reliable but the app does show how that can happen. The ATC controllers are not using the FR24 free ADS-B feeds so their data is much more reliable. This issue probably only shows up to ATC with the rare occasion that the airborne transmitter has a real problem.
