NEW YORK CITY, NY –
New York City Transit crews missed more than half of the required maintenance assignments at a Downtown Brooklyn electrical substation before a transformer exploded and stranded more than 4,000 subway riders, according to a new watchdog audit.
The Dec. 11, 2024 blast at the State Street substation sent flames through a sidewalk grate and forced riders off stalled trains between Jay Street-MetroTech and Hoyt-Schermerhorn Streets. Service was disrupted for about two hours.
The MTA inspector general found that crews failed to complete 12 of 23 required assignments at State Street between April and December 2024. That 52 percent failure rate was far worse than the systemwide result, where 19 percent of required substation maintenance work went unfinished that year.
The audit went beyond missed paperwork. It identified ignored fire-alarm trouble signals, untested smoke sensors and workers who did not always use required electrical protective equipment.
Investigators also found that the agency failed to determine why the transformer’s copper tubing split. NYC Transit said water leaked through the damaged tubing, mixed with synthetic oil and triggered the explosion.
But the post-incident review did not provide a reliable root-cause answer. According to reporting on the audit, a carpenter rather than a qualified electrical specialist or the manufacturer conducted the initial assessment. Equipment was later disassembled and left outdoors in poor weather, making a later forensic examination impossible.
That failure matters because a transit agency cannot prevent the next emergency if it does not preserve evidence and identify what caused the last one.
The fire-alarm findings raise another basic concern. At all six substations visited by inspectors that had fire alarms, systems displayed trouble signals. The audit found no entity consistently monitoring those warnings and said some employees ignored them.
Substations are essential to subway service. They convert and distribute the electricity that powers trains and station systems. A maintenance failure can shut down service, expose workers and riders to fire or electrical hazards, and trigger costly emergency repairs.
The agency’s own numbers show improvement, but not a clean bill of health. The share of unfinished assignments reportedly fell to 10 percent systemwide in 2025. At State Street, however, crews still missed 14 of 35 required assignments between April and November 2025, a 40 percent failure rate.
NYC Transit President Demetrius Crichlow called the missed inspections unacceptable. The agency said it restructured leadership in its Power Division, separated oversight of power and signal functions and increased attention to maintenance and critical upgrades.
Those changes now need measurable follow-through. The public should be able to see whether missed assignments are being closed on time, whether alarm trouble signals are monitored around the clock, whether qualified experts conduct incident reviews and whether safety equipment rules are enforced.
The 2024 explosion was not only a service disruption. It was a warning about the systems behind the system. Thousands of riders experienced the consequences, while the audit shows that basic safeguards had been left incomplete.
For the MTA, the accountability test is no longer whether it acknowledges the failures. It is whether the promised restructuring produces documented, sustained compliance before another transformer, alarm or neglected assignment turns into an emergency.
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