A medical examination Scrutiny following the accident diagnosed Check sleep apnea , which had hampered Hindering his ability to fully adjust Change his sleep patterns to the morning shift Change which he had begun Process_start working Employment two weeks earlier .

PATCO was demanding Request wage increases Cause_change_of_position_on_a_scale , safer working Employment conditions , a 32-hour week , and an end Process_end to long shift patterns .

High winds brought Causation down trees and power lines , though the storm was characterized Action by highly unusual rainfall patterns .