US 11,927,138 B2
Fan drive gear system
William G. Sheridan, Southington, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by RaytheonTechnologies Corporation, Farmington, CT (US)
Filed on Jun. 17, 2021, as Appl. No. 17/350,697.
Application 17/350,697 is a continuation of application No. 14/612,514, filed on Feb. 3, 2015, granted, now 11,067,005.
Prior Publication US 2021/0310421 A1, Oct. 7, 2021
Int. Cl. F02C 7/36 (2006.01); F02C 3/107 (2006.01); F02C 7/06 (2006.01); F02K 3/06 (2006.01)
CPC F02C 7/36 (2013.01) [F02C 3/107 (2013.01); F02C 7/06 (2013.01); F02K 3/06 (2013.01); F05D 2260/40311 (2013.01)] 30 Claims
OG exemplary drawing
 
26. A method of assembling a speed change mechanism comprising:
flexibly coupling a carrier to a static structure;
flexibly coupling a sun gear to a fan drive turbine;
flexibly coupling a ring gear to a fan drive shaft;
locating a first fan section support bearing forward of the speed change mechanism, wherein the speed change mechanism includes a ring gear; and
locating a second fan section bearing aft of a ring gear attachment point on the fan drive shaft, wherein an outer race of the first fan section bearing is fixed relative to an engine static structure and the first fan section bearing and the second fan section bearing each support the fan drive shaft.