C90 fried at mb
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C90 fried at mb
Heard that the OAA c90 had been through a bit of torture latley 1000degrees for 10 secs Both sides RHE new hot section LHE making smoke but still checking it out..... Anyone shed some light?
Have near on 1000hrs in C90' s and lots more with PT6. Got me stumped as to how you could even come close to cooking one like that,let alone 2!
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Start attempt with a weak battery?
On both engines?......................
You'll notice a weak start even before you put the fuel in. Even if you have half a clue you'll catch it early and cut the fuel before ITT gets anywhere near redline.
Have near on 1000hrs in C90' s and lots more with PT6. Got me stumped as to how you could even come close to cooking one like that,let alone 2!
I've started some pretty old PT6s in 40 degree heat on short turnarounds with no wind at various altitudes. Even with a slightly depleated battery they never got over their redline, let alone near the start limit!
1000deg for 10 seconds on both, crikey. Someone f****d up.
Glad I ain't the one having tea n biccies to explain that...... or paying the bill!
havick
*
it's a training aircraft, these things happen even with experienced drivers...
in a nutshell, big deal.. expensive mistake but I bet you they'll never do it again.
*
it's a training aircraft, these things happen even with experienced drivers...
in a nutshell, big deal.. expensive mistake but I bet you they'll never do it again.
I would be interested to hear what you actually think is unaccptable if cooking two engines is simply bad luck?
Starting a turbine should be easier than a piston.
I have maintained PT6 for over 40 years and have started them with varying states of battery charge and have never had an overtemp on start.
If the battery is too weak it will not generally spin it above 10-12% and should be enough warning to abandon there and then. If not then a hot start and CT wheel burning is assured, not to mention the NGV.
I have on my computer very descriptive pics of that and will try and post for the benifit of those who have not seen the damage which can be done with hot starts.
If the battery is too weak it will not generally spin it above 10-12% and should be enough warning to abandon there and then. If not then a hot start and CT wheel burning is assured, not to mention the NGV.
I have on my computer very descriptive pics of that and will try and post for the benifit of those who have not seen the damage which can be done with hot starts.
I highly doubt someone would hot start two engines at once. It more likely scenario is on takeoff or a goaround and they're not paying attention and fire walled the power levers, frying the engines. As stated above hot starting a PT6 is difficult as you should see it coming...low compressor speed or rapidly increasing ITT.
What absolute rubbish. These things may happen, it is a Big deal, and with this sort of attitude no wonder standards on the decline. It's simply not acceptable.
I would be interested to hear what you actually think is unaccptable if cooking two engines is simply bad luck?
Starting a turbine should be easier than a piston.
I would be interested to hear what you actually think is unaccptable if cooking two engines is simply bad luck?
Starting a turbine should be easier than a piston.
I have no affiliations with OAA but it seems that anyone will jump on any mistake that occurs with them. I just think that some incidents that aren't safety related should just be left in-house. I'm sure the instructor didn't set out to cook the engines, hopefully they've learned something from their expensive mistake. There's no need to advertise every c*ck up someone makes if it's probably most likely an individual lesson learned.
** Now that this thread has made the incident public knowledge, I would be more interested to know if it was a trend monitoring system that picked up the overtemp, or whether the instructor fessed upto it upon returning to the lines.
** There's a few helicopters that have had the same treatment as the said C90, but you don't see that being flaunted around here or on the rotorheads section.
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t's a training aircraft, these things happen even with experienced drivers...
in a nutshell, big deal.. expensive mistake but I bet you they'll never do it again.
in a nutshell, big deal.. expensive mistake but I bet you they'll never do it again.
notaplanegeek.. did you bother to read my post just above yours?
I'm alluding to the fact that someone pipes up on their 2nd post on pprune to take a swipe at OAA. I don't condone hot starts/overtemps, however it is an occurence that is not unheard of in our industry. I just don't feel that advertising a c*ck up that is really an individual lesson learned really benefits anyone.
My original post was rushed and probably didn't get my point across too well.
I'm alluding to the fact that someone pipes up on their 2nd post on pprune to take a swipe at OAA. I don't condone hot starts/overtemps, however it is an occurence that is not unheard of in our industry. I just don't feel that advertising a c*ck up that is really an individual lesson learned really benefits anyone.
My original post was rushed and probably didn't get my point across too well.
This event flaws me
It's a reflection on the training as well as the poor system knowledge of the user. PT-6's are amongst the most idiot proof turbines around even a kid could start one if he/she remembers the basic figures!
Hopefully someone has learnt big time on this one!
Wmk2
It's a reflection on the training as well as the poor system knowledge of the user. PT-6's are amongst the most idiot proof turbines around even a kid could start one if he/she remembers the basic figures!Hopefully someone has learnt big time on this one!
Wmk2
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You'll notice a weak start even before you put the fuel in. Even if you have half a clue you'll catch it early and cut the fuel before ITT gets anywhere near redline.
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notaplanegeek.. did you bother to read my post just above yours?
I'm alluding to the fact that someone pipes up on their 2nd post on pprune to take a swipe at OAA. I don't condone hot starts/overtemps, however it is an occurence that is not unheard of in our industry. I just don't feel that advertising a c*ck up that is really an individual lesson learned really benefits anyone.
My original post was rushed and probably didn't get my point across too well.
I'm alluding to the fact that someone pipes up on their 2nd post on pprune to take a swipe at OAA. I don't condone hot starts/overtemps, however it is an occurence that is not unheard of in our industry. I just don't feel that advertising a c*ck up that is really an individual lesson learned really benefits anyone.
My original post was rushed and probably didn't get my point across too well.
new
This is was never intended to take a dig at OAA. I have supervised new pilots starting turboprops and if one of my students did that I would be physically moving their hand into the idle cut off position for them if they we not to react. Still don't understand how it happens and yet there were two sets of eyes? Do they have BGT training there?
1000deg for 10 seconds on both, crikey. Someone f****d up.
Ok easy explanation... disgruntled instructor/cadet saying something to management? Yes I have heard of that before, but somewhere else.
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RFG - leaving the bungs in won't cause an overtemp, have seen it done by a certainer pprooner who will remain nameless - gets the oil a bit hot though! The bung will end up on top of the oil cooler.