The Washington Post reports that the National Transportation Safety Board (NTSB) is issuing air travel advisors for nearly all of the Southeast Indiana region, including parts of West Virginia.
The report comes after the NTSB said it was reviewing data from its investigation into the fatal crash of a passenger jet in 2014 that killed all four aboard.
The NTSB is also issuing additional advisories for several other states, including New Jersey, Connecticut, New York, Maryland, Pennsylvania and Rhode Island.
The agency also said it is increasing the number of days on the “air travel advisory” alert list to include some of the most-traveled locations.
In addition, it is also sending out alerts to passengers who may be traveling with their parents, siblings, spouses or children.
The airlines have until March 15 to notify the affected areas, or it will be added to the list of “flight cancellations” on their websites.
The new advisories will also be posted on the airlines website.
The airline industry has been grappling with what caused the fatal air crash in 2015 of a Boeing 737-800 that killed four people and injured more than 1,000 others.
The National Transportation Board, which oversees the aviation industry, is investigating the cause of the crash, but NTSB Chairman Deborah Hersman told reporters that the agency does not believe it is a pilot error.
She said she did not know how long it would take for the airlines to comply with the new rules.
In January, the NTSBs report found that the plane’s fuel system, which is supposed to minimize the risk of a crash, was not properly maintained and that the aircraft had a large number of problems, including an airbag system that was not fully deployed.
The panel said the plane had “multiple operational deficiencies” and the pilot failed to maintain the system properly.
NTSB also found that several problems with the plane were caused by the “loss of control” caused by engine trouble.