NTSB: ‘Serious Concern’ with ATC Alerts

Aviation International News » August 2006
September 12, 2006, 9:50 AM

Based on a study of 11 accidents that occurred between December 2002 and February this year, the NTSB expressed “serious concern” about the effectiveness of ATC’s minimum safe altitude warning system (MSAW) and conflict-alert systems. According to the Safety Board, in several of the accidents–including the Oct. 24, 2004, accident in which a Learjet 35A hit mountainous terrain, killing all five aboard–MSAW software provided timely warnings “but controllers did not provide appropriate safety alerts.” As a result of the study, the NTSB made several recommendations asking the FAA to “redesign” MSAW and conflict-alert systems to implement software changes and to improve controller training.

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