<table><tr><th>From:</th><th>jeffrey E. &lt;jeevacation@gmail.com&gt;</th></tr><tr><td>Sent:</td><td>Sunday, April 10, 2016 11:47 AM</td></tr><tr><td>To:</td><td>Larry Visoski;</td></tr><tr><td>Subject:</td><td>Re: GIV update</td></tr></table>

understood, question , does the =oltage max out at 9, ? if not then the valve works at 9,= altitude seems to effect it. so your =nswer seems possible, the voltage is applied as = result of resistance and computer. the right engine tgt is hi=hter does that mean that the fan valve is more closed than it should=be? maybe a result of a bad resisitor ? . is it a big de=l to change fan valve? , could it have been damaged by t=e bent tube you found? the other mystery is why a =ulse in the reading. ? valve? resistor , computer. , electrica= bus?

O= Sun, Apr 10, 2016 at 7:17 AM, Larry Visoski <█████████████████████> wr=te:

## Jeffrey

=div>Message from Pete,.below:

Dave and I ar= at airport now in case you decide to depart earlier than 10am„

## From Pete:

=p style="margin-top:0px;margin-bottom:0px">Hello Jeffrey,

Larry knows that I am long winded with=my responses,

Here is my brief-</=>

Feel free =o read all at your leisure-

They are mos=ly my thoughts so far-

suspect that the right precooler (fan air) modulati=g valve is bad.

They are both original<=span>

Fr=m the last video and Photo's;

## From Pete: (cont.)

## </=pan>

The readings show that the left side is be=ng given a voltage to the Torque motor sending a pressure to com=and the valve to be partially closed.

Ze=o volts, zero pressure is for full open, ie: cold air into the precooler a=d lowering the temperature into the supply system.

The signals show a steady state condition; 3 Volts, 3 PSI.

The valve has been sent signals, and has respo=ded correctly, and therefore is in the proper position to maintain 400 degrees in the supply system.

This is being =onitored, and controlled by the controller, and the sensor inputs.<=p>

There is no signal from the valve, the temperatu=e monitoring circuit controls the changes required.

The right side shows tha= it is being commanded to close due to the high voltage, and pressures.

( 9 volts, 9 PSI)

It seems that the signals are not being followed, or that the valv= cannot respond to them.

Since the contr=l system does not see the temperature change from the sensors, it continue= to increase the pressure to the valve.

=br>

As for the full vers=on-

This was done as a draft, please exc=se any duplication for items noted in the brief, these were my original th=ughts.

I agree with all that you stated-

T=e guidelines are for what the electrical system does.

We have found a bad controller- the sweeping voltage and pr=ssures, and replaced it-

There was also = bad sensor that was replaced-

We have s=apped the pressure regulator/torque motors.

Latest swap was the Anticipators.

## </=pan> (cont.)

The=e seem to be multiple issues, and we are narrowing them down.

I believe that the electrical and control systems are=now operating normally.

Now on to the ai= side of it.

From the last video, and photo's-

I believe that the left side is operating properly.

The Temp is being controlled by sending a regulated pre=sure to the valve, and it responding.

Th= pressure supplied is closing the valve, and maintaining the 400 Degrees r=quested.

No voltage equals no pressure, =alve open, lowering the Temperature.

The right side shows giving a close sig=al to the precooler (fan air) valve.

Hig= Voltage, and pressure supplied to the Valve on that side to close, and in=rease the temperature.

That side doesn&#=9;t seem to respond.

The valve has a 4 i=ch input/output side.

The control line i= about 1/4 inch.

<=pan style="background-color:rgba(255,255,255,0)">That is one of the line= that we found collapsed, and started us on this direction.

Is it possible t=at the supply air is not being able to overcome the pressure at the valve?=/span>

The pressure read at the panel is a cont=ol pressure, also known as "Muscle air".

Maybe the input air at the 4 inch diameter inlet, can overcome t=e control air.

I again suspect an issue =ith the LP valve-

=span style="background-color:rgba(255,255,255,0)">

There is no valve position, or feedback signal from the va=ve-

Just a quick check-<=span>

## </=pan> (cont.)

Th= ground checks for the precooler system are limited,

My training manual shows that the valve should start to open at about 74%=HP on the ground,

=span style="background-color:rgba(255,255,255,0)">Wing heat on, there sh=uld be airflow.

Regards,
<=iv>Pete
<=r>Sent from my iPhone

=br>--

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