On July 17, 2006, a Dassault Aviation MYSTERE FALCON 900 (registration N699BG) operated by Erg Aviation II Incorporated was involved in an aviation accident near Greenville, SC. Investigators recorded the probable cause as: Failure of the SPAD (Advanced Anti-Skid System) controller. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A transport category airplane overran the runway into an EMAS after an anti-skid system failure during landing. Post-incident testing identified a failed SPAD controller as the cause.
Incident Overview
During the final approach to landing, the anti-skid system test required a second attempt to obtain the correct indication. Upon touchdown, the co-pilot deployed the spoilers and thrust reverser. When the wheel brakes were applied, the airplane began to drift left of the centerline. The pilot reported that the wheel brakes did not appear to be effective, but he was able to maintain directional control. The airplane slowed but did not stop until it overran the runway and encountered an engineered materials arresting system (EMAS).
Investigation Findings
A post-incident functional test of the landing gear system was conducted in both ground and flight configurations. During the in-flight functional test, a malfunction in the right main landing gear brakes anti-skid system was detected. The anti-skid system was removed, and a separate functional test was performed. Examination of the system components revealed that the SPAD (Advanced Anti-Skid System) controller was the origination of the brake failure. The controller was replaced, and another functional test was conducted. The anti-skid system passed all functional tests, and the airplane was returned to service.
Probable cause
Failure of the SPAD (Advanced Anti-Skid System) controller.