Aug 6 (Reuters) - The U.S. National Transportation

Safety Board released documents on Tuesday morning ahead of

hearings into a January mid-air panel blowout of a near new

Boeing 737 MAX 9 jet.

The two-day hearing will review issues including 737

manufacturing and inspections, oversight by the Federal Aviation

Administration (FAA), and issues surrounding the opening and

closing of the door plug involving four missing bolts. Boeing ( BA )

has said no paperwork exists to document the removal of the

bolts.