EFTA02665631

From: Larry Sent: Saturday, January 14, 2017 4:29 PM To: Jeffrey E. Subject: Re: update 1;11 ask them,. Maybe, less air pressure into cabin due to reduced power setti=g, when power levers are up at cruise or climb, the outflow valve is exhaus=ing air from engines overboard to maintain cabin pressure,. During decent, t=e outflow valve closes to maintain cabin PSI, since airflow from engines is=reduced? Just a guess, I'll ask the exp=rts Thx Larry Sent from my iPad On Jan 14, 2017, at 1=:19 AM, jeffrey E. <jeevacation=gmail.com <mailto:jeevacation@gmail.com» wrote: question would be why is it like glass on descent On Sat, Jan 14, 2017 at 1=:12 PM, Larry > wrote: Jeffrey interesting findings: 1-left engine is oscillating air pressure into the cabin while APU bleed air=and engine bleed air are ON, while advancing the throttles, there is a chec= valve that prevents air from engine to back feed the air duct from APU int= cabin,. Suspect faulty check valve,. Inspecting and removing check value f=r possible fault. 2-during low power setting idle engine, the conditioned air that comes out b= your feet along lower cabin side wall is not working properly when selecti=g auto full cold., when you advance the power on engines, the air blows war= to hot air, even when full auto cold is selected,. In Manuel operations, i= works Normal,. This could be our issue during your last flight from Paris t= NY when you stated you couldn't control cabin temp properly., Mechanics are in constant communication with Tech ops for proper trouble sho=ting techniques for this item. Support in Brunswick has been great. Both could be contributing factors to our Vib issue i think? "`•just pulled plane into hanger to start sheet metal repair,. The trouble s=ooting of Cabin temp and check value will continue, since electrical wiring=and Cabin temp probe checks can be done in hanger with aircraft power. 3- precooler and pylon area, Fan Air modulation controller appear be to be w=rking normal, during their functional checks. Will keep you updated,. Thx Larry EFTA_R1_01916193 EFTA02665631 Sent from my iPad > On Jan 14, 2017, at 8:05 AM, jeffrey E. <jeevacation@gmail.com <mailto:jeevacati=n@gmail.com» wrote: > Would be nice to have expert on test flight and play with cabin temp co=trol etc = please note The information contained in t=is communication is confidential, may be attorney-client privileged, may=br>constitute inside information, and is intended only for the use of th= addressee. It is the property of JEE Unauthorized use, disclosure or=copying of this communication or any part thereof is strictly prohibited=br>and may be unlawful. If you have received this communication in error= please notify us immediately by return e-mail or by e-mail to jeevacation@gmail.com, a=d destroy this communication and all copies thereof, including all at=achments. copyright -all rights reserved 2 EFTA_R1_01916194 EFTA02665632