Accident: Bombardier Canadair CL600-2A12

The failure of a spring inside the No. 2 brake’s upper brake control valve and the fracture of the coupling subassembly of the No. 1 wheel speed sensor during landing, which resulted in the loss of braking action, and the pilot-in-command’s (PIC) deactivation of the antiskid system even though there were no antiskid failure annunciations, which resulted in the rupture of the Nos. 1, 3, and 4 tires, further loss of braking action, and subsequent landing overrun. Contributing to accident were the PIC’s improper landing flare, which resulted in landing several hundred feet beyond the aiming point marking, and his unsuccessful attempts to deploy the thrust reversers for reasons that could not be determined because postaccident operational testing did not reveal any anomalies that would have precluded normal operation.Contributing to the passenger’s injury was his leaving his seat intentionally while the airplane was in motion.

NTSB docket ERA15LA140

• Marco Island Executive Airport (MRK)0 nm (1 km) northVoydar estimateGreat-circle distance and initial true bearing between the two airport reference points.Version voydar.air.great_circle v1
• Naples Municipal Airport (APF)11 nm (21 km) north-westVoydar estimateGreat-circle distance and initial true bearing between the two airport reference points.Version voydar.air.great_circle v1