Narrative:

I am writing this report to document an enroute wake turbulence encounter that occurred [enroute] to atl. We were enroute in relatively clear; calm; VFR weather somewhere near the bna VORTAC in cruise flight at FL330. The winds aloft were very light; a very slight headwind. The ca (PF) had me request FL350 from ATC and I complied. Shortly after that; the ca went off the radio to brief the passengers and turn off the seatbelt sign; and I took the controls and radios. We received our clearance to climb to FL350; and I began our gradual climb. ATC then notified us that we were following a B747 seven miles ahead at FL350. The ca completed his briefing; and I returned the controls to him; also briefing him on the wake turbulence advisory and location of the B747. Just about our climbing through FL340; we began to feel the first indications of wake turbulence. About a second or two later; we hit the full wake turbulence effects; with our a/c rolling about 45 degrees (my estimate) first to the right; and then to the left. The ca soon regained control; and we both concurred that we should go back down to FL330. I requested that from ATC; advising them that we did hit the wake of the B747. We immediately got cleared and returned to FL330. The ca shortly thereafter checked on the flight attendants; and then briefed the passengers on what had happened. Nobody seemed to be injured or upset.

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Original NASA ASRS Text

Title: Medium Transport First Officer reported wake vortex encounter at FL350 in trail of a B747; causing a 45 degree roll to the right and then the left.

Narrative: I am writing this report to document an enroute wake turbulence encounter that occurred [enroute] to ATL. We were enroute in relatively clear; calm; VFR weather somewhere near the BNA VORTAC in cruise flight at FL330. The winds aloft were very light; a very slight headwind. The CA (PF) had me request FL350 from ATC and I complied. Shortly after that; the CA went off the radio to brief the passengers and turn off the seatbelt sign; and I took the controls and radios. We received our clearance to climb to FL350; and I began our gradual climb. ATC then notified us that we were following a B747 seven miles ahead at FL350. The CA completed his briefing; and I returned the controls to him; also briefing him on the wake turbulence advisory and location of the B747. Just about our climbing through FL340; we began to feel the first indications of wake turbulence. About a second or two later; we hit the full wake turbulence effects; with our a/c rolling about 45 degrees (my estimate) first to the right; and then to the left. The CA soon regained control; and we both concurred that we should go back down to FL330. I requested that from ATC; advising them that we did hit the wake of the B747. We immediately got cleared and returned to FL330. The CA shortly thereafter checked on the flight attendants; and then briefed the passengers on what had happened. Nobody seemed to be injured or upset.

Data retrieved from NASA's ASRS site as of July 2013 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.