A proposed AD calls for inspections of the front and aft surfaces of the pressure dome on Pilatus PC-12s for cracking and other damage that would have to be repaired. The proposal is based on 19 reports of nicks and scratches on pressure domes on the turboprop single caused by drill or rivet tools. The FAA said the damage could lead to rapid decompression. The AD would apply to 280 U.S.-registered PC-12s. Comments on the proposal are due by February 24.