The investigation into Wednesday's deadly elevator accident is focusing on work that was being done on the elevator shortly before a woman was killed as she tried to get on.
The elevators in the building at 285 Madison Avenue are maintained by Transel Elevator company.
The Department of Buildings is now spot checking elevators around the city that are managed by the same company.
NY1 has reached out to Transel for comment.
Meantime, 285 Madison Avenue remains closed as engineers look into possible structural problems caused by the force for the accident.
A portrait of the victim, Suzanne Hart, 41, is now on display in the lobby.
"It's very, very sad. I work right next door so, terrible thing," said one Midtown worker.
"No I don't work there but I feel very bad for her, because it could happen to anybody who, you know, works in a building, goes up in an elevator, goes to work, doesn't think of anything. It's very sad," said another.
Hart was a director of business development at the advertising agency Young & Rubicam.
She lived in Brooklyn with her longtime boyfriend.