Abstract: An engine includes a gearbox coupled to a first element and a second element. The engine may include a first speed sensor positioned on an input side of the gearbox, the first speed sensor operable to detect a first speed of the first element. The engine may further include a second speed sensor positioned on an output side of the gearbox, the second speed sensor operable to detect a second speed of the second element. The engine includes a controller comprising a processor and a memory coupled to the processor. The processor may be configured to receive data from the first speed sensor and the second speed sensor. The processor is also configured to detect a trigger event based on the data from the first speed sensor and the data from the second speed sensor. Upon detecting the trigger event, the processor communicates a command to an engine operational system.

Abstract: Gas turbine mounting configurations for backbone bending mitigations are described herein. An example gas turbine engine disclosed herein includes a pylon, an inlet to be subjected to an inlet load along an inlet load axis, a case assembly including a first case portion and a second case portion, a forward mount coupling the first case portion to the pylon, the coupling of the forward mount to the pylon defining a first line of action, an aft mount, and a thrust link coupling the second case portion to the pylon, the thrust link defining a second line of action, an intersection of the first line of action and the second line of action disposed at least one of: (1) on the inlet load axis and the centerline, (2) downstream of the inlet load axis and beneath the centerline, and (3) upstream of the inlet load axis and above the centerline.