On January 24th local time, the US Department of Transportation announced that the Federal Aviation Administration (FAA) has approved a thorough inspection and maintenance procedure for each grounded Boeing 737 MAX9 aircraft. Only after the inspection and maintenance are completed can these aircraft be eligible to resume operation.
The official website of the US Department of Transportation
The statement stated that after thoroughly reviewing the data of 40 grounded aircraft, the Federal Aviation Administration of the United States approved this detailed inspection and maintenance plan and convened a corrective action review committee composed of safety experts to review and approve inspection and maintenance procedures.
Federal Aviation Administration Director Mike Whittaker stated that the agency will not agree to Boeing's request to expand production or increase the 737 MAX production line until quality control issues identified during inspections and maintenance are resolved.