Timeline for What is the difference between unserviceable, unusable, and not maintained?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| May 24, 2022 at 21:26 | comment | added | supercat | @JanHudec: Are there fail-safes in ILS to ensure that if an antenna gets knocked out of position, it will transmit either nothing or some kind of error indication, rather than transmitting an incorrect glide slope? | |
| May 24, 2022 at 21:16 | comment | added | Jan Hudec | @supercat, ILS has a failure mode where the instrument will indicate on center, with no fault flag, but the system is actually not working. The monitoring equipment is supposed to check for this case, but without that there are known incidents where that happened. | |
| May 23, 2022 at 1:35 | comment | added | randomhead | Not quite sure of that, @supercat; that would be a good question on its own. My vague understanding is that the "monitoring" equipment simply checks for the presence of any signal on the correct frequency, while actual validation of the signal must be performed from the air (i.e. Flight Check). | |
| May 22, 2022 at 17:02 | comment | added | supercat | Can a pilot generally expect that a navigation aid which appears to be functioning will be supplying correct data, i.e. are navigation aids, whether monitored or not, designed in such a way that they will shut down in the presence of any faults that would otherwise cause them to transmit inaccurate data? | |
| May 22, 2022 at 15:36 | history | edited | randomhead | CC BY-SA 4.0 |
added 109 characters in body
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| May 22, 2022 at 10:23 | history | answered | randomhead | CC BY-SA 4.0 |