LH engineer seriously injured at MAN 13th Nov
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Yeh, you kick it fairly hard and listen to the sound it makes, if they all sound the same there all about the same px - what you cant tell is if thats low or high unless the profile of the tyre looks different at the bottom.
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Disgusted of Tunbridge
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So the back of a 2 or 3 cell Maglite is just right for the 'reverberation' test? Shame I have just gone onto a LED torch the size of a little finger.
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The best advice I can offer is to think of a car tyre..ie, if it looks "flat" or appears to be bulging slightly at the side wall, near to the area of tyre in contact with the ground (footprint), there is a reasonably good chance it is low on px...try doing a quick comparison check with the footprint of the other three as a guide......or simply ask an engineer (nicely!) to check it for you.
So you will be able to audibly tell the difference between tyre pressures over the air-con packs??? If it does look flatter than normal on the bottom ask the engineers to jack it and spin it so the rounder bit is on the bottom,hey presto!
Before this thread goes off on too much of a tangent is there any more news about the eng involved and what REALLY happened? Get well soon old chap.....
Before this thread goes off on too much of a tangent is there any more news about the eng involved and what REALLY happened? Get well soon old chap.....
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On the recovery
Last I heard is that he is not in al life threatening condition any more. Probably can be transported back home at the weekend. Sad news is that he lost part of foot and arm which could not be saved. Very sad story!
As to the course of the incident. No further information is available.
The AAIB and the airline are investigating.
Hope he recovers quickly
Micky
As to the course of the incident. No further information is available.
The AAIB and the airline are investigating.
Hope he recovers quickly
Micky
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210 Psi 15 Bar on the A380
Both temperature and pressure on the ECAM no guesswork on the walk round. They also have a handy colour coding on the ECAM tyre page. Green, Amber and yes you guessed it Red.
Both temperature and pressure on the ECAM no guesswork on the walk round. They also have a handy colour coding on the ECAM tyre page. Green, Amber and yes you guessed it Red.
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Strange thread this one.
Many thoughts of O2 vs. N2. Bar vs. PSI. I would guess neither are relevant here.
Getting back to basics, if the guy was certified he would know the basics?
The advice to always approach from front or rear is life saving. Some have mentioned, but if nothing is being done to the wheel/tyre it will sit there happy all day and night. I was always told treat it like a woman.. In front or behind work well ...but beside has the potential to ruin you. That's complete rubbish of course but you will all remember next time so I figure it's good advice.
I have not read the thread completely, but the poor guy was at the tyre because of a reported issue?
Have witnessed two tyres explode. Both on a car so we are not talking 200 psi. Mine happened after two new brand new (top branded) tyres were fitted. Drove up the A1. After a few roundabouts the steering was heavy. Stopped at the next service station and the nearside tyre measured 12 psi. Did the normal (stupid) thing and put a bit of air in. I reiterate....a bit! Way before 16 psi on the guage the thing blew up. Hot in there?
My knowledge of physics is just A-level but if the air (gas) in the tyre was very hot then the little air I added, expanded rapidly. Very rapidly on a carcass with weakened sidewalls due to the low pressure flexing for a few miles?
I didn't learn. I thought a fluke and went to the other front tyre. This time much much more gentle....still scared....but...BANG! at 14 psi.
Have never had any issues with tyres ever since but will never forget that trip up the A1.
Speedy recovery to the man concerned. Is not why we spend our time around aeroplanes.
Many thoughts of O2 vs. N2. Bar vs. PSI. I would guess neither are relevant here.
Getting back to basics, if the guy was certified he would know the basics?
The advice to always approach from front or rear is life saving. Some have mentioned, but if nothing is being done to the wheel/tyre it will sit there happy all day and night. I was always told treat it like a woman.. In front or behind work well ...but beside has the potential to ruin you. That's complete rubbish of course but you will all remember next time so I figure it's good advice.
I have not read the thread completely, but the poor guy was at the tyre because of a reported issue?
Have witnessed two tyres explode. Both on a car so we are not talking 200 psi. Mine happened after two new brand new (top branded) tyres were fitted. Drove up the A1. After a few roundabouts the steering was heavy. Stopped at the next service station and the nearside tyre measured 12 psi. Did the normal (stupid) thing and put a bit of air in. I reiterate....a bit! Way before 16 psi on the guage the thing blew up. Hot in there?
My knowledge of physics is just A-level but if the air (gas) in the tyre was very hot then the little air I added, expanded rapidly. Very rapidly on a carcass with weakened sidewalls due to the low pressure flexing for a few miles?
I didn't learn. I thought a fluke and went to the other front tyre. This time much much more gentle....still scared....but...BANG! at 14 psi.
Have never had any issues with tyres ever since but will never forget that trip up the A1.
Speedy recovery to the man concerned. Is not why we spend our time around aeroplanes.
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what a load of...
All these comments about kicking tyres, hitting with torch, Ha what a load of rubbish. 
Any medium size jet wheels can have a substantial pressure drop or be over inflated before becoming visibly different to the naked eye or by listening to the sound it makes!
It might be a reasonably effective method on a car but on an Aircraft, a calibrated tyre pressure gauge every time, TPIS is ok for a quick check but even that has to be cross verified with a gauge fairly often.
Back to the topic, Wish the guy the best of recoveries back home.
Any medium size jet wheels can have a substantial pressure drop or be over inflated before becoming visibly different to the naked eye or by listening to the sound it makes!
It might be a reasonably effective method on a car but on an Aircraft, a calibrated tyre pressure gauge every time, TPIS is ok for a quick check but even that has to be cross verified with a gauge fairly often.
Back to the topic, Wish the guy the best of recoveries back home.
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Anyone remember the nationair DC-8 crash in Jeddah a few years back caused by an under inflated tyre exploding in the wheel well after it had taxied approx 5 miles then took off? I can not remember the % of under inflation but it was large however visually no difference could be seen between the low tyre and others the only way to check is with a gauge or EICAS, if you are lucky enough to have one.
Surely the majority of this thread should be renamed something like: Working with Tyres and transferred to Tech Log.
Best wishes to the LH engineer and I hope he recovers soon.
Best wishes to the LH engineer and I hope he recovers soon.
Last edited by brakedwell; 19th Nov 2008 at 09:48.
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Believe a Caledonian/BUA VC10 had a similar event - early seventies? - on one of the S/America routes - tyre burst in u/c bay some minutes into the climb, thought initially to be an explosive device, considerable damage but fortunately the crew nursed it down safely.
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The only worthwhile visual info. you'll get off a low-pressure tyre is likely to be below 15 PSI in the case of a car, it's nearer 6 psi.........anything over and the tyre LOOKS normal......a gauge is the ONLY way to check pressure accurately...a pilot's walkround is, by the nature of things, fairly superficial (was going to say cursory) Any tyre appearing to be "flat" is probably already weakened by the landings /takeoffs since it lost pressure.
IMO, delay the flight, change the wheel/tyre assy.......then the Engineers can load-test it at their leisure in a cage.
The victim of this sad incident will now be severely hampered in his efforts to make a living. glad to hear he's on the long road back to recovery.
IMO, delay the flight, change the wheel/tyre assy.......then the Engineers can load-test it at their leisure in a cage.
The victim of this sad incident will now be severely hampered in his efforts to make a living. glad to hear he's on the long road back to recovery.
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Here here, however one would hope a company such as LH will be able to sort him out with a postion that doesnt require 100 per cent fitness ,QA, tech services etc
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The victim of this sad incident will now be severely hampered in his efforts to make a living. glad to hear he's on the long road back to recovery.
CLH and "Stiftung Mayday" are working close together to help not only him but also the family. As well as all employees, are gathering money to help him and his family. It is a very sad incident and we are all deeply moved.
Micky
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I am an ex CRJ-200 engineer and i can tell you that the nose tyres are very small and thus hold a small volume of N2. If you were to try and top-up these tyres with a regulated source of gas that was too high you will quickly be in trouble especially if there was some defect with the tyre.
Apologies if this has already been covered in this thread.
Apologies if this has already been covered in this thread.