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Transponders have to be turned off while you're at the airport and while the plane's being serviced on ground. I think 777 has 2 transponders, so you also need
by miratrix 13y ago
Transponders have to be turned off while you're at the airport and while the plane's being serviced on ground. I think 777 has 2 transponders, so you also need the ability switch from one to the other. Lastly, I believe all electronics on the plane must be on a breaker circuit in case of electrical shorts so that pilots can isolate and turn off faulty circuits.
But you're right, ACARS (the system through which the engine information was routed - http://en.wikipedia.org/wiki/Aircraft_Communications_Addressing_and_Reporting_System http://en.wikipedia.org/wiki/Aircraft_Communications_Address...) probably should be updated to add more information...
- TomGullen 13y agoI get that, but what about just simple rules? if(Plane.Altitude > 0 && Plane.FlightTime > 10 Minutes){ TransponderOn }
- verroq 13y agoWhat if the altitude meter breaks? Does the transponder go off?
- mburst 13y agoWhile this makes sense it may have to do what the poster above you said Lastly, I believe all electronics on the plane must be on a breaker circuit in case of electrical shorts so that pilots :can isolate and turn off faulty circuits.
- kurige 13y agoThe altitude of the "ground" varies by thousands of meters: https://www.google.com/search?q=highest+airport+altitude https://www.google.com/search?q=highest+airport+altitude Although, I guess you could just check if the landing gear is up. I'm sure there are corner cases I can't think of, but it seems like that would pretty much cover it.
- schneidmaster 13y agoDoesn't really solve the problem; a malicious actor could just lower the landing gear and then turn the transponder off.
- work_login_lost 13y agoWhatever, the point is, there should be a way to determine if a plane is in flight, and then disable the ability to turn off the transponder.
- will_asouka 13y agoMany crucial functions rely on knowing if the aircraft is airborne or not. Weight-on-wheel sensors determine this.