WASHINGTON — Members of Congress representing the Washington area say they’re “appalled” that the Metro subway system hasn’t installed components that protect the electrified third rail, possibly putting passengers’ lives at risk.

The National Transportation Safety Board asked Metro on Monday to install the missing components immediately. Metro said it would comply with that recommendation.

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The missing components protect the third rail from water and dirt that can lead to smoke or fire. The NTSB discovered the problem as part of an investigation into an electrical malfunction in January that caused a train to fill with smoke. One woman died and more than 80 others were sickened during that incident.

The Washington-area Congressional delegation sent a letter to Metro on Tuesday demanding an immediate fix to the problem.

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