EFTA02503018

From: jeffrey E. <[email protected]> Sent: Friday, May 1, 2015 6:09 PM To: Lvjet Subject: Re: GIV vibration update thanks, speakers are great. On Fri, May 1, 2015=at 12:32 PM, Lvjet < <mailto > wrote: Jeffrey I've been on the phone with Rolls Royce, reference plan of attack =o resolve vibration issue. Rolls Royce is very proactive to resolve this item, They inform they w=ll work in conjunction with Gulfstream Tech ops to assist in trouble shoot=ng. I have fwd'd a summary email highlighting our trouble shooting eff=rts, including, repainting the wings. Tech support Rolls did inform, this is not the first time they have ad=ressed this type of issue, one recent involved a GV, in which cabin sound =roofing was added, their complaint was Harmonic tone in cabin with Engine =ync ON. Rolls informs that removing the engine for Fan balance on test cell is=not a recommended procedure, in the past, engines that are balanced in the=test cell do not sync with the airframe once installed, its a common pract=ce to Fan balance once the engine is reinstalled on the airframe. Best con=itions to fan balance requires calm wind. Rolls does recommend removing only the Fan from the engine and ba=ance in test cell, especially on FANS that require a lot of weights such a= our Right side #2 engine, IF its determined this is the correct avenue to=explore? asap. Rolls is checking their schedule to see if they can work the aircraft =n Montreal next week,. I will update you thank you Larry =lease note The information contained in this communication is c=nfidential, may be attorney-client privileged, may constitute inside in=ormation, and is intended only for the use of the addressee. It is the =roperty of JEE Unauthorized use, disclosure or copying of this co=munication or any part thereof is strictly prohibited and may be unlawf=l. If you have received this communication in error, please notify us i=mediately by return e-mail or by e-mail to [email protected] <mailto:[email protected]> , and destroy th=s communication and all copies thereof, including all attachments. copy=ight -all rights reserved EFTA_R1_01631613 EFTA02503018