WASHINGTON, DC – FEBRUARY 12: News photographers view the charred traction power cables from last months L’Enfant Metro accident on display in Washington, DC on February 12, 2015. Portions of 3rd rail cover board and the electrical system components from WMATA L’Enfant tunnel accident were made available by the NTSB today. (Photo by Linda Davidson / The Washington Post)

On Monday, the National Transportation Safety Board issued another critical recommendation related to the fatal Jan. 12 Yellow Line smoke incident. NTSB investigators found problems with certain electrical connections in Washington’s Metro system that require “immediate action”.  Following is the full text of the NTSB letter to WMATA officials recommending the agency take action to address electrical short circuiting hazards in the subway system.

The letter is one of a series that have been issued following the fatal January smoke incident in which one person died of smoke inhalation and scores of others were injured after being trapped on a train in a tunnel just outside of the L’Enfant station.

NTSB/WMATA recommendation