N.Y.C. Admin. Code § 28-304.6.3: § 28-304.6.3 Reporting an unsafe or hazardous condition.

If a periodic inspection or category test reveals that any elevator or other conveying system is unsafe or hazardous to life and safety, the device is to be taken out of service immediately by the agency performing the inspection or test and the building owner notified immediately. The performing agency shall notify the department by telephone, electronically or in writing within 24 hours.