EFTA02467696.pdf

From: jeffrey E. <[email protected]> Sent: Sunday, April 10, 2016 11:47 AM To: Larry Visoski; Subject: Re: GIV update 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- I 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; EFTA_R1_01576738 EFTA02467696  </=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. 2 EFTA_R1_01576739 EFTA02467697  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> 3 EFTA_R1_01576740 EFTA02467698  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>-- =AO please note The information contained i= this communication is confidential, may be attorney-client privileged,=may constitute inside information, and is intended only for the use =f the addressee. It is the property of JEE Unauthorized use, disclos=re or copying of this communication or any part thereof is strictly pro=ibited and may be unlawful. If you have received this communication =n error, please notify us immediately by return e-mail or by e-mail to =a href="mailto:[email protected]" target="_blank">jeevacation@gmai=.com, and destroy this communication and all copies thereof, inc=uding all attachments. copyright -all rights reserved 4 EFTA_R1_01576741 EFTA02467699