Ferrari Mailing List: Re: Your stuff Erik

[Rick Moseley (ramosel]

Good question. Good association.  Most likely not.  (never say never)

This bleed air valve in a jet is in the compressor section of the engine, ahead (upstream) of the combustion chambers and the turbine section.  There should never be an combustibles (with said solvent) in the compressor section. Now, if the bleed valve is sticking open, when you back off the throttles you can get a compressor stall... and a potentially a "backfire" type condition...  engine starts banging and may eject some combustion materials out through the compressor.  cLyDe says he also had a fire indication.  So it is possible your contaminates could get to the bleed air valve, but the valve has already stuck open before the condition occurs which caused the ejection.   Does that make sense in the flow pattern?

Hmmm...  Try this: for the corrosive to get to the bleed air valve, the valve would have already had to fail and that creates a condition that would let the corrosive get to the valve.

From what I know... what I've been hearing... the sticking is being caused by dis-use for a few months while planes were parked during the lockdown.   cLyDe filled me in on the model of GE engine involved and it's primarily certified on older versions of 737.

On Friday, July 24, 2020, 10:00:53 PM PDT, Peter Rychel <dino308gt4 [at] hotmail.com> wrote:

Saw this on the (Seattle) news this evening.

 

So how would this valve corrode? As I’m involved with aircraft refueling equipment, I do installations and repairs on jet fuel additive systems. Methyl Carbitol is injected into the stream of jet fuel being delivered to a plane. This substance is used to prevent icing up of the fuel at high altitude. Problem is, it never dissolves into the fuel, it stays in suspension AND is highly corrosive. Even we’re not immune as we have to warranty pressure transducers we’ve installed (to display when each injection happens) because they got eaten up by the stuff.

 

They mention this as a “...engine bleed air 5^th stage check valve...”. Does this have anything to do with that additive?

 

Peter

 

Sent from Mail for Windows 10

 

 

From: Erik Nielsen
Sent: July 24, 2020 12:46 PM
To: PeterGT4
Cc: The FerrariList
Subject: Re: [Ferrari] Your stuff Erik

 

And boom. 

 

https://www.scribd.com/document/470256027/Faa-Ead-for-737s#fullscreen&from_embed

 

Happy flying!

On Jul 24, 2020, at 9:03 AM, Erik Nielsen <judge4re [at] gmail.com> wrote:

We commented that if it is Boeing, it ain’t going.

 

They had little paperclips made in the shape of the 737 Max.  In a review meeting with senior executives, I joked that it was just one more plane that they built that couldn’t fly.  I was promoted two weeks later...

 

  

On Jul 24, 2020, at 9:00 AM, Rick Moseley <ramosel [at] pacbell.net> wrote:

 

I remember the old Flying Bus driver adage... "If it ain't Boeing, I ain't Going".

 

Now you see Boeing's name attached to anything and you just wince a bit and avert your gaze.

 

On Friday, July 24, 2020, 4:47:35 AM PDT, Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:

 

 

https://www.defensenews.com/land/2020/07/23/canceled-missile-defense-warheads-cost-tripled-schedule-slipped-despite-numerous-warnings-gao-finds/?utm_source=Sailthru&utm_medium=email&utm_campaign=EBB%2007.24.20&utm_term=Editorial%20-%20Military%20-%20Early%20Bird%20Brief

 

 

     RF4-4EVR

 

Scars are Tattoos with better stories !

 

If you have no enemies, you have no character !

 

Clyde Romero    

 

 

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On Jul 24, 2020, at 7:45 AM, Erik Nielsen <judge4re [at] gmail.com> wrote:

https://newsroom.bugatti/en/feature-stories/bugatti-baby-reborn-performance-and-final-specifications-announced

 

Still anticipating September-ish delivery.

 

The chassis for ours is complete and assembly has begun.

 

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