The Federal Aviation Administration announced Wednesday that it is imposing unprecedented restrictions on Boeing’s jet manufacturing facilities. It will cap any 737 Max production rate increases until it’s clear Boeing can ensure its quality control is fully compliant with regulations. At the same time, the FAA said it has approved the detailed inspection measures it will require of air carriers that fly Boeing 737 Max 9s before the grounded jets can return to passenger service. That provides Alaska Airlines and United Airlines a path to getting their Max 9 fleets back in the air. Those planes…