self test for pitot static system?
A LH Cargo 772 recently took off with the two main static port lines not connected after maintenance. Clogged, capped or frozen Pitot tubes have caused air plain crashes.
Is there no self testing system commercially available or has been proposed that would detect major leaks, unconnected lines or closed ports to the outside world? https://www.bfu-web.de/EN/Publicatio...ublicationFile |
That’s pretty sad. Some engineers signed off the work as completed, when it obviously was not. Could have cost lives, as it was it did cost the price of all that fuel they dumped.
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Originally Posted by BRE
(Post 10965840)
A LH Cargo 772 recently took off with the two main static port lines not connected after maintenance. Clogged, capped or frozen Pitot tubes have caused air plain crashes.
Is there no self testing system commercially available or has been proposed that would detect major leaks, unconnected lines or closed ports to the outside world? |
Yes, all that has been discussed ad nauseam in the Rumours & News forum. Does anyone know if a self test has been proposed or commercialised?
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Originally Posted by BRE
(Post 10968430)
Yes, all that has been discussed ad nauseam in the Rumours & News forum. Does anyone know if a self test has been proposed or commercialised?
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They avoid that issue nowadays by placing a sensor directly into the Port. Wether it is Pitot or Static. This eliminiates long lines of Pressurehose which could be a problem. And yes, one could do really high damage to costly Equipment. So this Problem will "phase itself out" and become an electrical problem. But at least one easier diagnosable. Avionics guy here.
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For my part I was more astonished that the indepenent check of work being done to System L and R would not involve any tests to System L and R but to the backup System C. But I have to concede - it did the job, they had one set of working clocks.
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Per AMM, leak test of the pitot-static system is not required after flushing the system if quick disconnects are removed and reinstalled.
Having said that, does not exonerate. cod |
Originally Posted by BRE
(Post 10968430)
Yes, all that has been discussed ad nauseam in the Rumours & News forum. Does anyone know if a self test has been proposed or commercialised?
Now, how are we going to verify that the system has returned to normal? E.G. all the valves that were installed have returned to normal state? And it would have to be certified/configurated/tested that the system would not operate in flight. What about a short taxi and the test is not complete, a take off warning horn when power is applied? And even if the pressure would blow off the tape/obstruction, there is no easy why to verify it is all gone, which means errors that are unknown. I'm pretty sure no operator wants to add this complexity to a "simple" system. |
Originally Posted by cod liver oil
(Post 10970576)
Per AMM, leak test of the pitot-static system is not required after flushing the system if quick disconnects are removed and reinstalled.
Having said that, does not exonerate. cod |
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