The Federal Aviation Administration is seeking a $5.4-million fine against Boeing for faulty wing parts on dozens of 737 Max planes.

The planes have been grounded worldwide since March after two fatal crashes, but FAA's proposed penalty does not refer to the flight-control software that was implicated in those two deadly flights.

The proposed fine caps a devastating week for Boeing. A Boeing plane crashed in Iran killing all 176 people on board and hundreds of internal messages were released that revealed employees boasted about bullying regulators to limit government scrutiny of the 737 Max.