FlyDubai incident 30/9

[Quickstatus]

the electric motor driven pumps kick in.

But what provides power to the electric pump?
JB mentioned the windmilling engines and/or residual power in batteries?

 

[AviatorInsight]

But what provides power to the electric pump?
JB mentioned the windmilling engines and/or residual power in batteries?

Yes, you're right. My mistake, it was a late one yesterday. They are powered by the transfer bus not the standby AC power bus. So they will get some residual power from the generator with a windmilling engine if the N2 can be kept above a certain percentage.

 

[John82]

So of the yet to be proven allegations flying around are disturbing. Such as “the co-pilot intended to repeat 9-11 into some Israeli buildings.”

Apparently this came from the terrorist in interrogation.

 

[jb747]

Yes, you're right. My mistake, it was a late one yesterday. They are powered by the transfer bus not the standby AC power bus. So they will get some residual power from the generator with a windmilling engine if the N2 can be kept above a certain percentage.

Given the speed, wouldn't the engine driven pumps still be providing substantial pressure?

 

[AviatorInsight]

Given the speed, wouldn't the engine driven pumps still be providing substantial pressure?

I had to open up the flight simulator for this and yes, the EDP are still providing pressure, and therefore you still have hydraulic power. No manual reversion.

The N2 throughout the descent was still high. To do a windmill start the NG must be at minimum 11% N2 and 8.5% on the MAX.

 

[Quickstatus]

manual reversion.

Would recovery be possible if the controls manually reverted?

 

[AviatorInsight]

Would recovery be possible if the controls manually reverted?

With the aerodynamic loads at those speeds? I'd say impossible. A lot of muscle power is needed during manual reversion under normal flying segments let alone anything else.

 

[Quickstatus]

BlancoL said 3.08G in the pull out

I wonder what the elevators were trimmed at just prior when it was at cruise.

 

[jb747]

BlancoL said 3.08G in the pull out

I wonder what the elevators were trimmed at just prior when it was at cruise.

The elevators aren't moved to trim, but rather the entire stab. I get the feeling that it might still have been trimmed to 1G level flight, largely because if much nose down trim had been involved I doubt that you'd achieve much of a pull up at all. Rather like those MCAS events. I also get the feeling that the FO wasn't the sharpest tool in the shed, and didn't think though the setup at all.