DEFLECTION LIMITER FOR A GAS TURBINE ENGINE

A gas turbine engine (20) includes a turbine section (28) that includes a fan drive turbine (46). A geared architecture (48) includes a sun gear (70) in driving engagement with the fan drive turbine (46). A plurality of planet gears (74) surrounds the sun gear (70). A ring gear (78) surrounds the plurality of planet gears (74). A deflection limiter (84A-D) mechanically attaches the ring gear (78) to an engine static structure (36). The deflection limiter (84A-D) includes a first support (86A-D) fixed to the ring gear (78) that has a first interlocking feature and a second support (88A-D) fixed to the engine static structure (36) that has a second interlocking feature. The first and second interlocking features define at least one of a radial clearance (94A-D) of between 0.005 inches (0.127 mm) and 0.080 inches (2.032 mm) or a circumferential clearance (96A-D)of between 0.005 inches (0.127 mm) and 0.250 inches (6.350 mm). A fan section (22) includes a plurality of fan blades (42) in driving engagement with the geared architecture (48) through a fan drive shaft (82).