About 1:45 p.m. on July 3, 1981, New York City Transit Authority (NYCTA) train 142NL struck the rear of NYCTA train 132NL north of the Sutter Avenue Station in Brooklyn, New York. The collision was preceded by a signal failure in the area at 11:12 a.m. which the NYCTA command center was not aware of. Trains were continually dispatched into the failure area at other than scheduled times, without being warned about the inoperative signals, until 1:37 p.m. During this time, signal department employees were flagging trains by the inoperative signals while attempting to determine the cause of the failure. The motorman of train 142NL was killed, and 140 passengers and crewmembers on the trains were injured. Estimated damage was $543,200.