Boeing (NYSE:BA) shares fell 3% in premarket trading Monday following the Federal Aviation Administration's (FAA) recommendation for door plug inspections on the Boeing 737-900ER model.
This suggestion comes in the wake of the Federal Aviation Administration's (FAA) grounding of 171 Boeing 737 MAX 9 planes after a mid-air cabin blowout incident earlier in January.
The FAA's recent directive urges operators of the 737-900ER to visually inspect mid-exit door plugs to ensure proper security.
Despite not belonging to the newer MAX fleet, the 737-900ER shares the same optional door plug design as the MAX, facilitating the addition of an extra emergency exit door when needed.
The FAA's safety alert disclosed that some airlines conducting additional inspections on the 737-900ER mid-exit door plugs found issues with bolts during maintenance inspections.
Shares in Boeing supplier Spirit AeroSystems (NYSE:SPR) fell 2% in response to the news.