Boeing, Spirit Aerosystems shares tank after 737 Max 9 incident

Shares of Boeing and parts supplier Spirit Aerosystems fell following a weekend incident aboard an Alaska Airlines 737 MAX 9 jet where part of the plane's fuselage blew out.

Shares of Boeing and parts supplier Spirit Aerosystems tanked Monday after the Federal Aviation regulators grounded certain Boeing 737 MAX 9 jets for further inspection after a piece of fuselage tore off the left side of an Alaska Airlines-operated aircraft on Friday, causing the airliner to make an emergency landing after the cabin depressurized. Shares of Alaska Airlines also fell. 

The aircraft was approaching 16,000 feet of altitude when it experienced rapid depressurization after a panel that serves as a plug for an emergency exit door used on some variations of the Boeing 737 MAX 9 was torn off. The pilot immediately signaled the plane would have to land, and it safely returned to Portland, Oregon, with all 171 passengers and six crew members aboard.

BOEING 737 MAX 9 JET, ALASKA AIRLINES INCIDENT: WHAT TO KNOW

No serious injuries were reported in the incident, and nobody was sitting in the seats adjacent to where the door plug blew out, according to the airline. Parts of the seat next to the fuselage, including the headrest, were missing.

CRITICAL PIECE OF BOEING 737 MAX 9 JET FOUND

Dow member Boeing traded at a one-month low as tracked by Dow Jones Market Data Group. 

Boeing CEO Dave Calhoun called an all-employee safety meeting following the incident, according to the Seattle Times which obtained his memo and shared via X. 

FOX Business' Eric Revell contributed to this report.