Boeing 737 Max 9 still without a timeline to return to the sky

After five days of inspections and 40 evaluations, Boeing's 737 Max 9 remains grounded — without a clear timeline to take off.

The Federal Aviation Administration said Wednesday it had begun reviewing data from the first round of inspections on the grounded 737 Max 9 planes.

Those planes — about 171 of them — have become the subject of regulatory and consumer scrutiny after a door plug, installed to cover an unused emergency exit, flew out on an Alaska Airlines flight from Portland on Jan. 5.

The FAA grounded the Max 9 planes that fill the space with a door plug shortly after the incident.