Honeywell TFE731-40BR Turbofans
The Learjet 75's Honeywell TFE731-40BR engines have essentially the same internal parts as the -20BRs that power the Model 45XR. To boost the -40BR's thrust to 3,850 lb. from 3,500 lb., virtually all that was needed was a 10% throttle push involving a software change inside the -20BR's digital...
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