MADISON, Wis. -- University of Wisconsin Hospital Med Flight operations will be back in the air on Friday, two weeks after a helicopter crash killed three near La Crosse.

VIDEO: Watch The Report

The flight crews have been grounded since the crash on May 10.

Med Flight director Bruce Lindsay said that service will run 12-hour shifts for now -- from 9 a.m. to 9 p.m. -- because that is the busiest times.

Officials said that regional flight services will be notified. If Med Flight services are needed off-hours, other services will step in.

The helicopter will not have any changes to equipment at this time, officials said. After the crash, officials said that the helicopter wasn't equipped with night-vision goggles or computerized voice systems to warn of approaching terrain.

Lindsay said that he thinks once the technology is available to be installed, it will be.

"When a new aircraft becomes available, we're sure that it will be fitted for that," he said. "However, just that the aircraft is ready for night-vision technology doesn't mean that crews have been trained for it."

They said that they're confident the helicopters are safe.

"No one has asked to be taken out. Many have volunteered to be in," Lindsay said. "We are still evaluating -- day by day, hour by hour -- on where the program stands."

Fifteen-minute confidence rides started this week and will continue Thursday for all crew members.

Patient flights will begin Friday.

The hospital will continue with one Med Flight helicopter. Officials said that when the return to 24-hour service, they will get a second helicopter.

Lindsay said that three-member crews will continue to be on all flights. He said that there are 38 members of the Med Flight crew -- about 22 physicians, 10 flight nurses and six pilots

He said that the crew members are taking steps to prepare emotionally to get back in the air.

"Even just crews just seeing aircraft in the air from their homes or from work has been helpful," Lindsay said. "For those who are going to be staffing the weekend, they're excited and anxious and it couldn't come soon enough. There are those that are at a different in their healing process."

The announcement comes one day after an initial National Transportation Safety Board report said that there was no flight plan or equipment violations on the Med Flight helicopter that crashed.