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Transponder/GPS issues today
Anyone know of a work around for the issues Rockwell Collins 737/757 transponders and GPS have started to exhibit today ? What is the root cause ? |
Reportedly also affects all CRJs and CSeries/A220s, which also carry Rockwell Collins kit.
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I got the email but on VAC for a few days and no details, what's the issue?
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Up on our board.....so it's a "source from another source" -
This is from another source: From sources posted on public forum: Just had a call with the Command Center: Below are notes from the Call. United, Delta, Air Canada all report that their regional partners who fly CRJ type aircraft are also experiencing widespread issues. Currently we have not heard of any mainline aircraft being affected with the exception of United's 737-900. WAAS and GPS appear to be up and running without issue. Fort Bliss/ZFW/ZAB all have NOTAMs advising of GPS jamming today and the FAA has requested a stoppage of any jamming in the interim. The FAA has also contacted NORAD to see if they are engaged in any activity. Different email... Currently this is causing widespread delays across Mesa, Skywest and PSA and appears to be affecting CRJ aircraft only. Republic, Piedmont, Envoy and Compass have not reported any issues. More to follow. |
I may be getting old and the brain getting a bot rusty but, I am sure I read an article about this issue within the last couple of months. I don't remember the details but I am sure it mentioned Rockwell taking pro-active measures and it may have had something to do dates, along the lines of the Y2K 'issue'.
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Originally Posted by KelvinD
(Post 10490269)
I may be getting old and the brain getting a bot rusty but, I am sure I read an article about this issue within the last couple of months. I don't remember the details but I am sure it mentioned Rockwell taking pro-active measures and it may have had something to do dates, along the lines of the Y2K 'issue'.
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FAA has issued a blanket waiver for all aircraft experiencing GPS\ADS issues today https://www.fly.faa.gov/adv/adv_othe...eDate=06/09/19ATCSCC AdvisoryATCSCC ADVZY 029 DCC 06/09/2019 GUIDANCE FOR ADSBMESSAGE: EVENT TIME: 09/1230 - 10/0400Z COMMAND CENTER HAS APPROVED BLANKET WAIVER FOR ALL FLIGHTS CURRENTLY HAVING GPS/ADSB ISSUES WITH THEIR TRANSPONDERS. INDIVIDUAL WAIVER REQUESTS TO THE COMMAND CENTER ARE NO LONGER NECESSARY. HOWEVER, AFFECTED FLIGHTS SHOULD FILE FLIGHT PLANS VIA THE FOLLOWING PARAMETERS: YOU MUST FILE FL280 AND BELOW. YOU MUST FILE RNAV ROUTING AND IF YOU ARE UNABLE,YOU MUST FILE VIA TRADITIONAL AIRWAYS AND/OR NAVAIDS. THIS BLANKET APPROVAL IS VALID ONLY UNTIL JUNE 10, 0400Z. EFFECTIVE TIME: 091231 - 100430SIGNATURE: 19/06/09 12:31 |
Originally Posted by swh
(Post 10490291)
FAA has issued a blanket waiver for all aircraft experiencing GPS\ADS issues today https://www.fly.faa.gov/adv/adv_othe...eDate=06/09/19ATCSCC AdvisoryATCSCC ADVZY 029 DCC 06/09/2019 GUIDANCE FOR ADSBMESSAGE: EVENT TIME: 09/1230 - 10/0400Z COMMAND CENTER HAS APPROVED BLANKET WAIVER FOR ALL FLIGHTS CURRENTLY HAVING GPS/ADSB ISSUES WITH THEIR TRANSPONDERS. INDIVIDUAL WAIVER REQUESTS TO THE COMMAND CENTER ARE NO LONGER NECESSARY. HOWEVER, AFFECTED FLIGHTS SHOULD FILE FLIGHT PLANS VIA THE FOLLOWING PARAMETERS: YOU MUST FILE FL280 AND BELOW. YOU MUST FILE RNAV ROUTING AND IF YOU ARE UNABLE,YOU MUST FILE VIA TRADITIONAL AIRWAYS AND/OR NAVAIDS. THIS BLANKET APPROVAL IS VALID ONLY UNTIL JUNE 10, 0400Z. EFFECTIVE TIME: 091231 - 100430SIGNATURE: 19/06/09 12:31 |
Affecting Bombardier aircraft as well. According to Bombardier its to do with the June 9th GPS Satellite update.
They've suggested a work around involving powering up the aircraft with GNSS Breakers pulled, then resetting the breakers once everything else is running......... No idea if that's gonna work. |
A little more background on hackaday.com/2019/06/09/gps-and-ads-b-problems-cause-cancelled-flights/ of all places:
Something strange has been going on in the friendly skies over the last day or so. Flights are being canceled. Aircraft are grounded. Passengers are understandably upset. The core of the issue is GPS and ADS-B systems. The ADS-B system depends on GPS data to function properly, but over this weekend a problem with the quality of the GPS data has disrupted normal ADS-B features on some planes, leading to the cancellations. WHAT IS ADS-B AND WHY IS IT HAVING TROUBLE? Automatic Dependent Surveillance-Broadcast (ADS-B) is a communication system used in aircraft worldwide. Planes transmit location, speed, flight number, and other information on 1090 MHz. This data is picked up by ground stations and eventually displayed on air traffic controller screens. Aircraft also receive this data from each other as part of the Traffic Collision Avoidance System (TCAS). ADS-B isn’t a complex or encrypted signal. In fact, anyone with a cheap RTL-SDR can receive the signal. Aviation buffs know how cool it is to see a map of all the aircraft flying above your house. Plenty of hackers have worked on these systems, and we’ve covered that here on Hackaday. In the USA, the FAA will effectively require all aircraft to carry ADS-B transponders by January 1st, 2020. So as you can imagine, most aircraft already have the systems installed. The ADS-B system in a plane needs to get position data before it can transmit. These days, that data comes from a global satellite navigation system. In the USA, that means GPS. The GPS system is currently having some problems though. This is where Receiver autonomous integrity monitoring (RAIM) comes in. Safety-critical GPS systems (those in planes and ships) cross-check their current position. If GPS is sending degraded or incorrect data, it is sent to the FAA who displays it on their website. The non-precision approach current outage map is showing degraded service all over the US Eastern seaboard, as well as the North. The cause of this signal degradation is currently unknown. WHAT HARDWARE IS AFFECTED? GPS isn’t down though — you can walk outside with your cell phone to verify that. However, it is degraded. How a plane’s GPS system reacts to that depends on the software built into the GPS receiver. If the system fails, the pilots will have to rely on older systems like VOR to navigate. But ADS-B will have even more problems. An aircraft ADS-B system needs position data to operate. If you can’t transmit your position information, air traffic controllers need to rely on old fashioned radar to determine position. All of this adds up to a safety of flight problem, which means grounding the aircraft. Digging through canceled flight lists, one can glean which aircraft are having issues. From the early reports, it seems like Bombardier CRJ 700 and 900 have problems. Folks on Airliners.net are speculating that any aircraft with Rockwell Collins flight management systems are having problems. This is not a small issue, there are hundreds or thousands of canceled flights. The FAA set up a teleconference to access the issue. Since then, the FAA has issued a blanket waiver to all affected flights. They can fly, but only up to 28,000 feet. This is a developing story, and we’ll be keeping an eye on it. Seeing how the industry handles major problems is always educational, and there will be much to learn in the coming days. |
And a comment from a Scott H. on the same site:
The airline I work for is having this issue. The story we’re getting is that at approximately 3:00z on 6/9/19, the WAAS system on all of the GPS satellites received a software upgrade and that the software upload was somehow corrupted. This means that aircraft equipped with the WAAS MMR’s (Multi mode receivers) manufactured by Rockwell Collins are unable to resolve the WAAS signal from the satellites, thus causing MMR and GPS failure messages in the aircraft. The aircraft equipped with the pre WAAS MMR’s are not affected. Our airline is working with Rockwell Collins, the aircraft manufacturer and the FAA to receive permission to return our aircraft back to the pre WAAS configuration until the WAAS systems on the satellite constellation are operating normally again. |
Perhaps, I am old school, perhaps my airplane is old school, but in my younger years we had something called a compass.
And you know what? There even was a guy that crossed the ocean with a "compass". => Lindberg in a canvas airframe without heater or aircon and I don't think he had a stewardess to keep him company either. See where technology has brought us? To fly? You need a pilot and an airplane. Every line of software is a line too many. |
There even was a guy that crossed the ocean with a "compass". => Lindberg |
Originally Posted by Vilters
(Post 10490495)
There even was a guy that crossed the ocean with a "compass". => Lindberg in a canvas airframe without heater or aircon .
and he didn't know where the airfield was once he arrived at Paris. So are you really sure about this "navigation by compass only" anecdote? |
Originally Posted by Euclideanplane
(Post 10490503)
According to Wikipedia "Lindbergh navigated only by dead reckoning (he was not proficient at navigating by the sun and stars and he rejected radio navigation gear as heavy and unreliable)"
and he didn't know where the airfield was once he arrived at Paris. So are you really sure about this "navigation by compass only" anecdote? Direction (compass) and speed X elapsed time plotted tells you (about) where you should be. Having to find the airport at the end would be totally expected. The compass was also usefull to point in correct direction :) |
Arrggghhhh.."Software update", should of known.
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Originally Posted by MurphyWasRight
(Post 10490514)
That reads exactly like dead reckoning using a compass to me.
Anyway, GPS provides heading information anyway, in addition to whatever else information you need, so I am not sure I see the point. You use whatever instruments available to tell you where your are and where you are headed. |
Ded reckoning
Arghhhh! One of my pet hates -it's DED reckoning, 'Ded' being short for 'Deduced'
Pedantly yours... |
Originally Posted by Grummaniser
(Post 10490528)
Arghhhh! One of my pet hates -it's DED reckoning, 'Ded' being short for 'Deduced'
Pedantly yours... One might also instantiate "dead on", "dead heat", "dead drunk" in each of which the term 'dead' qualifies as 'absolutely' |
Originally Posted by Maninthebar
(Post 10490533)
That source of all error, Wikipedia, says "The term "dead reckoning" was not originally used to abbreviate "deduced reckoning," nor is it a misspelling of the term "ded reckoning." The use of "ded" or "deduced reckoning" appeared much later in history, no earlier than 1931; in contrast to "dead reckoning" appearing as early as 1613 in the Oxford English Dictionary. The original intention of "dead" in the term is not clear however. Whether it is used to convey "absolute" as in "dead ahead," reckoning using other objects that are "dead in the water," or using reckoning properly "you’re dead if you don’t reckon right," is not known"
One might also instantiate "dead on", "dead heat", "dead drunk" in each of which the term 'dead' qualifies as 'absolutely' :) |
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