From: Larry < Sent: Saturday, January 14, 2017 4:13 PM To: Jeffrey E. Subject: Re: update 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 Sent from my iPad > On Jan 14, 2017, at 8:05 AM, jeffrey E. <[email protected]> wrote: > Would be nice to have expert on test flight and play with cabin temp > contr=l etc <?xml version=.0" encoding=TF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/Propertylist-1.0.dtd"> <plist version=.0"> <clict> <key>conversation-idgkey> <integer>56947</integer> <key>date-last-viewed</key> <integer>0</integer> <key>date-received</key> <integer>148441037