A preliminary report found that the cable that snapped in the September Lisbon funicular crash , killing 16 people, was uncertified for passenger use and highlighted maintenance shortcomings.

Portugal’s Office for Air and Rail Accident Investigations (GPIAAF) said in the report late on Monday that it was still impossible to say whether the use of an inadequate cable had caused the crash, as other factors were also at play.

GPIAAF’s final report is due by next September.

The yellow tram-like carriage, which carries people up and down a steep hillside in the Portuguese capital, hit a building after leaving the track on September 3.

Gloria, which opened in 1885, is one of three old funiculars operated by the municipal public transport company Carris, which suspended their use after the

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