The MRT crash in Pasay was reportedly caused by a failed coupling procedure according to DOTC Chief Secretary Joseph Emilio Abaya.

The MRT crash injured at least 34 people after the emergency coupling procedure of two MRT trains at Taft Avenue station has gone wrong causing the other train to get derailed and crash against the wall.

The coupling procedure is done when a defective train is being attached to a working train. The brakes of both trains are disabled with the working train pushing the defective train to reach its destination. This emergency procedure has to be done in less than 15 km per hour or else, the force will push the defective train onwards while the working train come to a sudden halt.

Check out this infographic posted by Inquirer’s Dennis Maliwanag on TWitter:

@DMaliwanagINQ @Team_Inquirer @inquirerdotnet Ang kapal na lang ng mukha pag di pa nag-resign.

— Ali Vergel (@prinz_ali75) August 13, 2014

Secretary Abaya issued a public apology on Wednesday citing the department has “no excuse” for the incident. He assured the public that the result of the black box investigation will be released to the media today to give more light to the incident.

ABS-CBN’s report on the MRT Crash:

Video of the crash aftermath which became viral on Facebook:

Image source: Facebook