Verb conjugation of "destornillar" in Spanish

Since it had no wind and no turbulences at all we landed right on time. I had an entire afternoon until my connection to Havana and decided to spend it in the duty free shops, or in the restaurants.
After placing my luggage there I decided to walk into town and rent a bike. The neighbor of the guest house stopped me on the street and asked me if I was Mike. She told me that she was Luisa.
After a short guided tour we came back to pick up our luggage and left to the airport. When the airplane took off it was already dark outside. We were surprised about the airline's good condition and service.