USAIR CRASH . . . INQUIRY BEGINS

Two minutes before impact, the two pilots of a USAir jet that crashed Saturday in Charlotte, N.C., were warned of dangerous wind shear, federal investigators say. The National Transportation Safety Board unearthed that and other details in a search for why the DC-9 went down with 57 people on board, killing 37. The NTSB, which hasgathered testimony from five surviving flight crew members, planned to release more specifics this evening.parpar