Rolls-Royce (Allison) 250-B17 and -C20 engines
Rolls-Royce (Allison) 250-B17 and -C20 engines -- Install a turbine energy- absorbing ring (part number 23035175) in the plane of the first-stage turbine wheel if the powerplant does not already have such a ring. If necessary, install first-stage and second-stage turbine nozzles and a gas producer...
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