A320ceo xbox

[RicardoLVFR]

I've had two instances now of the A320ceo SL losing speed when in the cruise. The engines will suddenly spool back and the speed drops. Despite me selecting the speed manually, the speed will drop and the engines refuse to provide power.

was ATHR on, and you had speed on managed or selected mode?

[AirbusAmateur]

AT was on. The throttles were in the CL detent. In the cruise and had been for a while in manual speed select of 0.78 Mach

[RicardoLVFR]

when you say engines refuse to provide power, do they shut off entirely?

and if you disable AT, do you get to manage the speed? will need a bit more to test if you can tell me more or less how and under what cirucmnstances of flight this happens.

[AirbusAmateur]

when you say engines refuse to provide power, do they shut off entirely?

and if you disable AT, do you get to manage the speed? will need a bit more to test if you can tell me more or less how and under what cirucmnstances of flight this happens.

I'll try my best.

I had another instance this afternoon. All the times it has happened mid-cruise. All of a sudden, the engines roll back and stop. Speed drops and the plane obviously starts a descent. Bearing in mind I'm hundreds of miles from top of descent.

I try to get the engines to spool back up by increasing speed but that has no effect. I have to disable autopilot and apply TOGA power to get any response. Then when you reapply autopilot, it works once more.

[RicardoLVFR]

when you say engines refuse to provide power, do they shut off entirely?

and if you disable AT, do you get to manage the speed? will need a bit more to test if you can tell me more or less how and under what cirucmnstances of flight this happens.

I'll try my best.

I had another instance this afternoon. All the times it has happened mid-cruise. All of a sudden, the engines roll back and stop. Speed drops and the plane obviously starts a descent. Bearing in mind I'm hundreds of miles from top of descent.

I try to get the engines to spool back up by increasing speed but that has no effect. I have to disable autopilot and apply TOGA power to get any response. Then when you reapply autopilot, it works once more.

Will try to see if we can replicate this. But quick question, to what speed does the manage speed commands to ? lower?

or the high speed its supposed to replicate.

[AirbusAmateur]

when you say engines refuse to provide power, do they shut off entirely?

and if you disable AT, do you get to manage the speed? will need a bit more to test if you can tell me more or less how and under what cirucmnstances of flight this happens.

I'll try my best.

I had another instance this afternoon. All the times it has happened mid-cruise. All of a sudden, the engines roll back and stop. Speed drops and the plane obviously starts a descent. Bearing in mind I'm hundreds of miles from top of descent.

I try to get the engines to spool back up by increasing speed but that has no effect. I have to disable autopilot and apply TOGA power to get any response. Then when you reapply autopilot, it works once more.

Will try to see if we can replicate this. But quick question, to what speed does the manage speed commands to ? lower?

or the high speed its supposed to replicate.

The managed speed doesn't do anything. Power just continues to drop, the engines roll back and I and up descending.

[RicardoLVFR]

I'll try my best.

I had another instance this afternoon. All the times it has happened mid-cruise. All of a sudden, the engines roll back and stop. Speed drops and the plane obviously starts a descent. Bearing in mind I'm hundreds of miles from top of descent.

I try to get the engines to spool back up by increasing speed but that has no effect. I have to disable autopilot and apply TOGA power to get any response. Then when you reapply autopilot, it works once more.

Will try to see if we can replicate this. But quick question, to what speed does the manage speed commands to ? lower?

or the high speed its supposed to replicate.

The managed speed doesn't do anything. Power just continues to drop, the engines roll back and I and up descending.

I meant, what speed does it command to? does it decrease? I ask because there is a bug whereas the plane enters descent mode and speed reduces. Just want to confirm this is that problem, or another issue.

[AirbusAmateur]

Will try to see if we can replicate this. But quick question, to what speed does the manage speed commands to ? lower?

or the high speed its supposed to replicate.

The managed speed doesn't do anything. Power just continues to drop, the engines roll back and I and up descending.

I meant, what speed does it command to? does it decrease? I ask because there is a bug whereas the plane enters descent mode and speed reduces. Just want to confirm this is that problem, or another issue.

Oh. I wasn't aware of this bug. I can't tell you what speed it commands to, I can't recall. I'm sorry. As I said, it's only happened on three flights and I was all over the place trying to keep the plane flying at altitude.

It sounds like it could be this bug you mentioned.

[RicardoLVFR]

The managed speed doesn't do anything. Power just continues to drop, the engines roll back and I and up descending.

I meant, what speed does it command to? does it decrease? I ask because there is a bug whereas the plane enters descent mode and speed reduces. Just want to confirm this is that problem, or another issue.

Oh. I wasn't aware of this bug. I can't tell you what speed it commands to, I can't recall. I'm sorry. As I said, it's only happened on three flights and I was all over the place trying to keep the plane flying at altitude.

It sounds like it could be this bug you mentioned.

in that case whilst we fix it with the avionics update, change to selected speed, instead of managed speed.