WASHINGTON — United Airlines drew a $2.7 million fine from the government for violating rules aimed at protecting disabled passengers and preventing long tarmac delays.

The Transportation Department said there was a significant increase in 2014 in disability-related complaints regarding United. A department review found that United had failed to give passengers with disabilities prompt service getting on and off planes, and in many instances damaged or delayed the return of wheelchairs and other mobility devices.

The department cited United operations in Houston, Chicago, Denver, Newark and Washington's Dulles International Airport.