Narrative:

At cruise 37;000 ft. Encountered wake turbulence from a 747. Kansas city center had pointed out the 747 and we saw them early. They were cruising a thousand feet above us going west. When they passed us I didn't think that they were close enough to be a concern. 1-2 minutes after they passed we hit their wake turbulence. Our aircraft rolled 25-30 degrees to the left. Both the first officer and I grabbed the control stick and the autopilot was off. We got a dual input warning and since it was my first officer's leg; he was the pilot flying; I called 'you got it?' I didn't want us both trying to control the aircraft at the same time. He confirmed he had it. The aircraft then was rolled to the right. Then we had another roll to the left; more shallow. We gained I believe at least 500ft. While we struggled to control the roll. I called kansas city center and told them that we had this problem with the wake turbulence. They seemed unconcerned. I checked on our flight attendants. Our first had fallen and hurt her back but didn't want any medical assistance. All the passengers were seated. I made an announcement explaining what had caused the turbulence. My copilot and I had food trays on our tables and nothing had come off; but from smooth cruise flight to what felt like moderate turbulence was alarming.in my experience I've not had an encounter with wake turbulence in cruise as bad as that. When the 747 had passed us the horizontal separation had looked sufficient that I didn't think the wake would be as severe as it was. In the future I will query ATC more when advised that a heavy is pointed out as traffic and find out how close they predict that their wake path may be.

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Original NASA ASRS Text

Title: A319 flight crew reported a wake turbulence encounter at FL370 from an opposite direction B747 that was 1000 feet above them.

Narrative: At cruise 37;000 ft. encountered wake turbulence from a 747. Kansas City Center had pointed out the 747 and we saw them early. They were cruising a thousand feet above us going west. When they passed us I didn't think that they were close enough to be a concern. 1-2 minutes after they passed we hit their wake turbulence. Our aircraft rolled 25-30 degrees to the left. Both the first officer and I grabbed the control stick and the autopilot was off. We got a dual input warning and since it was my first officer's leg; he was the pilot flying; I called 'you got it?' I didn't want us both trying to control the aircraft at the same time. He confirmed he had it. The aircraft then was rolled to the right. Then we had another roll to the left; more shallow. We gained I believe at least 500ft. while we struggled to control the roll. I called Kansas City Center and told them that we had this problem with the wake turbulence. They seemed unconcerned. I checked on our flight attendants. Our first had fallen and hurt her back but didn't want any medical assistance. All the passengers were seated. I made an announcement explaining what had caused the turbulence. My copilot and I had food trays on our tables and nothing had come off; but from smooth cruise flight to what felt like moderate turbulence was alarming.In my experience I've not had an encounter with wake turbulence in cruise as bad as that. When the 747 had passed us the horizontal separation had looked sufficient that I didn't think the wake would be as severe as it was. In the future I will query ATC more when advised that a heavy is pointed out as traffic and find out how close they predict that their wake path may be.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.