Senator Charles Schumer called for a full investigation of Metro-North following a series of delays, breakdowns and deadly accidents during an appearance on NY1's "Inside City Hall" Friday night.
The latest incident happened Thursday night, when thousands of riders were stranded for about two hours along the Hudson, Harlem and New Haven lines.
Officials blame human error.
They say work crews removed one of two main power supply units for replacement, but didn't realize a wire had been disconnected on the other unit, which caused a computer system that controls all of Metro-North's train movements to go down.
It came on the heels of last month's deadly derailment at Spuyten Duyvil.
Four people were killed when a Grand Central-bound train flew off the tracks.
On Friday night's "Inside City Hall," Schumer said riders can't continue to go through these issues.
"What is going on here on one of the busiest commuter railroads in the country, vital to New York's economy, bringing people from Westchester, Connecticut into New York every day?They now have more than three strikes against them," Schumer said. "Something is dramatically wrong. We need a full investigation, and we have to turn that place inside out."
The railroad also had two accidents in Connecticut last May, one of them deadly.
The widow of a Metro-North worker who was struck and killed by a train during one of those incidents filed a $30 million lawsuit against the agency Friday.