Allegiant Air Grounds Half of Fleet.
	
	
		Allegiant Air has canceled 18 of 121 scheduled flights, a move that  affected roughly 2,700 passengers.
Brian  Davis, a spokesman, said 16 of the flights originally planned for  Friday would operate on Saturday, when the carrier also expects to  complete a full schedule of 33 flights.
Davis  added that more disruptions were likely on Sunday and Monday, which are  busier days. "We do anticipate more cancellations," he said during a  conference call.
The Las Vegas-based discounter, which offers flights to leisure  destinations such as MCO and FLL in Florida and cities  in Hawaii, said it had secured seven aircraft from other carriers to  help it provide flights as it makes the inspections of its MD-80s.
To  complete the needed checks, the slides must be taken off planes and  sent to a third party for overhaul. Davis also said Allegiant was buying  evacuation slides in a bid to return planes to service as soon as  possible.
The FAA directed the  carrier to report the status of the evacuation slides on its MD-80s  while investigating an emergency evacuation of an Allegiant flight in LAS  on Monday. As part of the FAA review, Allegiant said it found  that it was not meeting updated manufacturer guidelines that called for  older slides to be overhauled every year, and so decided to pull planes  from service to make the checks. Allegiant said it had been checking the  MD-80 slides every three years.
"The  FAA this week became aware that Allegiant Air may not have inspected  some emergency evacuation slides on its MD-80 fleet at required  intervals," Ian Gregor, public affairs manager with the FAA Pacific  Division, said in a statement.