Andy 1 Report post Posted August 22, 2007 hmm i am wondering how can i detect a bloked pitot static tube during a preflight check..?? is there any way? Share this post Link to post Share on other sites
FK Wong 0 Report post Posted August 22, 2007 hmm i am wondering how can i detect a bloked pitot static tube during a preflight check..?? is there any way? man tough question.lol.from what i recalled,we just have to ensure that it is not covered/sealed during the preflight check.Whether the reading on the instrument is reliable or not we do a speed check during takeoff.If we find it unreliable we will perform a rejected takeoff procedure (in this case the airspeed will not be active/climb if it blocked).As for the altimeter(static),aerodrome QNH that is set on the altimeter should show its elevation field as per the chart and the manufacturer or company will lay out the max deviation allowed.Passing these limitations will require the aircraft to checked. correct me if i am wrong,just thinking from the logic point of view. =) Share this post Link to post Share on other sites
Mohd Idham 0 Report post Posted August 22, 2007 Blow it with your mouth, if Airspeed Indicator shows some reading, then its ok... :lol: Share this post Link to post Share on other sites
FK Wong 0 Report post Posted August 22, 2007 ensure the pitot heat switch is off and the pitot probe is cool before blowing,otherwise you'll burn your mouth.lol Share this post Link to post Share on other sites
Andy 1 Report post Posted August 23, 2007 (edited) man tough question.lol.from what i recalled,we just have to ensure that it is not covered/sealed during the preflight check.Whether the reading on the instrument is reliable or not we do a speed check during takeoff.If we find it unreliable we will perform a rejected takeoff procedure (in this case the airspeed will not be active/climb if it blocked).As for the altimeter(static),aerodrome QNH that is set on the altimeter should show its elevation field as per the chart and the manufacturer or company will lay out the max deviation allowed.Passing these limitations will require the aircraft to checked. correct me if i am wrong,just thinking from the logic point of view. =) hmm thank you wong.. i got the same answer from my instructor.. well blowing the pitot tube with ya mouth sounds logic too but i have never seen any pilots doing it before..he..he.. lol Edited August 23, 2007 by Andy Share this post Link to post Share on other sites
FK Wong 0 Report post Posted August 23, 2007 hmm thank you wong.. i got the same answer from my instructor.. well blowing the pitot tube with ya mouth sounds logic too but i have never seen any pilots doing it before..he..he.. lol You are welcome=).Which school are you in now? Share this post Link to post Share on other sites
Andy 1 Report post Posted August 23, 2007 (edited) You are welcome=).Which school are you in now? well i am curentlly doing my private pilot licence ppl with subang flying club. FLYING IS REALLY FUN Edited August 23, 2007 by Andy Share this post Link to post Share on other sites
Gavin Andrew David 6 Report post Posted August 24, 2007 I thought you were in some engineering thingy with MAS ? Gave up on that ah? SFC ... interesting ... Share this post Link to post Share on other sites
Andy 1 Report post Posted August 25, 2007 (edited) I thought you were in some engineering thingy with MAS ? Gave up on that ah? SFC ... interesting ... nope i did not give up my engineering at all... well ppl that i am taking is part time and just for fun and to understand the aircraft operation in a better way .. but for carrer i am still into the maintenance side Gavin. Edited August 25, 2007 by Andy Share this post Link to post Share on other sites
Pieter C. 5 Report post Posted August 25, 2007 nope i did not give up my engineering at all... well ppl that i am taking is part time and just for fun and to understand the aircraft operation in a better way .. but for carrer i am still into the maintenance side Gavin. Congrats, Andy, now we can shake hands (same reason for me to become PPL-holder)... Share this post Link to post Share on other sites
Juanda I. 0 Report post Posted August 27, 2007 (edited) hmm thank you wong.. i got the same answer from my instructor.. well blowing the pitot tube with ya mouth sounds logic too but i have never seen any pilots doing it before..he..he.. lol Andy, I agree with FK Wong .. check the ASI on your take-off run and if it doesn't register then abort the take-off. Blowing into the pitot tube is not recommended coz if it's really blocked, then it will only make it worst. And furthermore, you won't know for sure coz the ASI will read zero if blocked ... and it will also read zero if you haven't blown hard enough. Not that I'm an expert or anything .. just my dua sen worth Happy flying and cheers! Edited August 27, 2007 by mingalababya Share this post Link to post Share on other sites
Radzi 2 Report post Posted August 27, 2007 hmm thank you wong.. i got the same answer from my instructor.. well blowing the pitot tube with ya mouth sounds logic too but i have never seen any pilots doing it before..he..he.. lol We pilots expect the engineers to blow it for us....... Share this post Link to post Share on other sites
Hakan 2 Report post Posted August 27, 2007 as I remember from glider flight school, our instructors were says "do not blow pitot tube and static ports while making visual preflight check" that rules also written on our checklist in visual inspection section. We asked the same question them becouse glider school located on a huge grass field and so many grasshopers were in there! so "how can we sure pitot tube blocked by a bug or not?" answer was simple " if airspeed indicator does not work while takeoff, you would know that!" ofcourse it was a joke, beacouse when gliders on ground, everytime pitot tube pines plugged. Pitot static system is very sensitive and diaphragm can be lose form or failure easy when blowing into tube. system does work by different value of dynamic and static ports pressure when airborne. Share this post Link to post Share on other sites
