How a Delta crew member's emergency slide mistake could cost as much as $100,000

• A Delta crew member accidentally deployed an Airbus A220 emergency evacuation slide on Saturday. • They did not "disarm" the door before lifting the handle. • Industry experts say the cost could be upward of $100,000, while Airbus estimated up to $200,000.

Passengers on Delta Flight 3248 got an unusual welcome at the gate in Pittsburgh on Saturday: the unmistakable roar of a giant airbag filling.

A passenger recalled hearing a "boom" when an emergency evacuation slide deployed — a nightmare for the crew and passengers, and a likely expensive bill for Delta.

A Delta spokesperson told Business Insider that the incident occurred on an Airbus A220 parked at the gate after it had flown from Salt Lake City. The crew member — Delta didn't specify whether it was a flight attendant or pilo