Butler National has expanded its ADS-B Out offerings on legacy Learjet platforms after receiving an STC for a solution on Learjet Models 31 and 31A with traffic collision avoidance system (TCAS) II.

Butler Aviation's STC for ADS-B Out applies to Learjet models 31, 31A, 35, 35A, 36, 36A and 60. The study assessed potential damage a drone impact could cause to critical flight surfaces on ...