A220 cruising altitude

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palebird
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Re: A220 cruising altitude

Post by palebird »

Typical Bombardier product.
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goldeneagle
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Re: A220 cruising altitude

Post by goldeneagle »

palebird wrote: Fri Mar 20, 2020 3:49 pm Typical Bombardier product.
Didn't the engine come from Pratt ?
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notwhoyouthinkIam
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Re: A220 cruising altitude

Post by notwhoyouthinkIam »

goldeneagle wrote: Fri Mar 20, 2020 4:06 pm
palebird wrote: Fri Mar 20, 2020 3:49 pm Typical Bombardier product.
Didn't the engine come from Pratt ?
Shh.
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telex
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Re: A220 cruising altitude

Post by telex »

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Daniel Cooper
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Re: A220 cruising altitude

Post by Daniel Cooper »

Wow it's caused by resonance. Some engineer is getting fired.
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Fanblade
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Re: A220 cruising altitude

Post by Fanblade »

Inverted2 wrote: Fri Mar 20, 2020 3:17 pm Just like modern appliances. High tech and efficient but don’t last very long.
Lol,

That sounds exactly like the critics of the “plastic A320” over 30 years ago. It will never last!

All new tech has growing pains. These new geared engines are a huge leap. Give it time.

Maintaince nicknamed the A320 the A360 back in the day. It would go out and need a computer reset. Back to the gate. Reset and leave.

They nicknamed the E190 the E180. It left the gate and needed a computer reset. Back to the gate and stayed.
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Gino Under
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Re: A220 cruising altitude

Post by Gino Under »

It’s not an Auto Throttle issue.
It’s an engine issue.
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telex
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Re: A220 cruising altitude

Post by telex »

Gino Under wrote: Fri Apr 03, 2020 6:36 am It’s not an Auto Throttle issue.
It’s an engine issue.
Software...
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BMLtech
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Re: A220 cruising altitude

Post by BMLtech »

Not a really a software issue, engines are blowing due to internal resonance and vibration. Problem can be addressed by a software load that will prevent the fadec from operating in the range that the resonance occurs.
https://www.flightglobal.com/safety/a22 ... 58.article
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Gino Under
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Re: A220 cruising altitude

Post by Gino Under »

But, it’s software that regulates the engine core speeds causing the engine resonance and vibration issue through the FADEC/EEC which are software dependent. The rest is just a bunch of metal bits whizzing around at great speed under high temperature extremes. And it does so very quietly, I might add.
So far, it looks like just the Swiss who’ve had IFSDs on their 300s.
Better safe than sorry.
Are we throwing bombardier under the bus for this one? I noticed some like to, that’s all.
Airbus anyone?

Cheers
:partyman:
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telex
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Re: A220 cruising altitude

Post by telex »

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co-joe
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Re: A220 cruising altitude

Post by co-joe »

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Last edited by co-joe on Thu May 07, 2020 9:08 am, edited 1 time in total.
BMLtech
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Re: A220 cruising altitude

Post by BMLtech »

https://www.flightglobal.com/safety/a22 ... 69.article

Often when they try to correct an issue with a software load, it ends up causing a new unforeseen issue.
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teacher
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Re: A220 cruising altitude

Post by teacher »

Seems to be happening to new engines only. These engines are built to such tight tolerances that anything slightly out can cause an issue. Once the engines seem to get some time on them and “loosen up” they seem ok.

It’s a combination software and hardware fix. Word is maybe the fix will be approved by next spring. There is a procedure to climb above FL290 but most companies have decided the risks are not worth the reward.

As for costs, well, at FL290 the burn is similar to an E190 but with 39 more seats and lots more cargo room.
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telex
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Re: A220 cruising altitude

Post by telex »

teacher wrote: Sun Jul 05, 2020 7:04 pm Seems to be happening to new engines only. These engines are built to such tight tolerances that anything slightly out can cause an issue. Once the engines seem to get some time on them and “loosen up” they seem ok.

It’s a combination software and hardware fix. Word is maybe the fix will be approved by next spring. There is a procedure to climb above FL290 but most companies have decided the risks are not worth the reward.

As for costs, well, at FL290 the burn is similar to an E190 but with 39 more seats and lots more cargo room.
What companies are those? Disengaging the A/T is too great a risk?
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ZBBYLW
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Re: A220 cruising altitude

Post by ZBBYLW »

telex wrote: Sun Jul 05, 2020 7:10 pm
teacher wrote: Sun Jul 05, 2020 7:04 pm Seems to be happening to new engines only. These engines are built to such tight tolerances that anything slightly out can cause an issue. Once the engines seem to get some time on them and “loosen up” they seem ok.

It’s a combination software and hardware fix. Word is maybe the fix will be approved by next spring. There is a procedure to climb above FL290 but most companies have decided the risks are not worth the reward.

As for costs, well, at FL290 the burn is similar to an E190 but with 39 more seats and lots more cargo room.
What companies are those? Disengaging the A/T is too great a risk?
They probably aren't afraid of the pilots flying around without AutoThrust. AC encourages it, but if the tolerances are exceeded that will be several million dollars. Best burn a bit more fuel than blow up an engine.
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Blue42
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Re: A220 cruising altitude

Post by Blue42 »

telex wrote: Sun Jul 05, 2020 7:10 pm
teacher wrote: Sun Jul 05, 2020 7:04 pm Seems to be happening to new engines only. These engines are built to such tight tolerances that anything slightly out can cause an issue. Once the engines seem to get some time on them and “loosen up” they seem ok.

It’s a combination software and hardware fix. Word is maybe the fix will be approved by next spring. There is a procedure to climb above FL290 but most companies have decided the risks are not worth the reward.

As for costs, well, at FL290 the burn is similar to an E190 but with 39 more seats and lots more cargo room.
What companies are those? Disengaging the A/T is too great a risk?


Air Baltic is the only one that operates the 300s above FL290
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