Federal investigators have released a preliminary report on a safety incident. The report shows that communication issues were discussed by air traffic controllers and pilots one week prior to the incident. A meeting was held to address the lack of a standard warning call. An alternative plan was agreed upon but was unsuccessful on the day of the incident. The incident occurred when a jet and helicopter were in the air at the same time, potentially violating safety procedures.

Further details on the incident are available from the National Transportation Safety Board's report. The incident is being investigated and more information may be released in the future.