Erj first officer reported a 'moderate to severe' wake turbulence encounter at 14;000 ft on arrival ...

Narrative:

The event happened in houston approach airspace. We were just starting to descend via the gesnr at 14;000. At gesnr we encountered moderate to severe wake turbulence. We were about 12 nm behind a B747. The controller advised us that we were following the B747. Upon encountering the wake; the autopilot disconnected as the aircraft rolled 30+ degrees. Once we regained control of the aircraft the captain immediately checked on our flight attendant. She was fine and was able to brace herself and avoid injury. The seatbelt sign was also on at the time of the encounter. After checking on the flight attendant; the captain reported the encounter to the controller. ATC allowed us to pull our speed to attempt to avoid any other encounters. We should have laterally offset or ATC should have given us more space. We were level and flew right through the path of the 747. They should have put us on another arrival; or vectored us off to avoid having us fly through this path.

Original NASA ASRS Text

Title: ERJ First Officer reported a 'moderate to severe' wake turbulence encounter at 14;000 ft on arrival into IAH 12 miles in trail of a B747.

Narrative: The event happened in Houston Approach airspace. We were just starting to descend VIA the GESNR at 14;000. At GESNR we encountered moderate to severe wake turbulence. We were about 12 nm behind a B747. The Controller advised us that we were following the B747. Upon encountering the wake; the autopilot disconnected as the aircraft rolled 30+ degrees. Once we regained control of the aircraft the Captain immediately checked on our FA. She was fine and was able to brace herself and avoid injury. The seatbelt sign was also on at the time of the encounter. After checking on the FA; the Captain reported the encounter to the Controller. ATC allowed us to pull our speed to attempt to avoid any other encounters. We should have laterally offset or ATC should have given us more space. We were level and flew right through the path of the 747. They should have put us on another arrival; or vectored us off to avoid having us fly through this path.

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.

Attributes
ACN	1446293
Time
Date	201705
Local Time Of Day	1201-1800
Place
Locale Reference	IAH.Airport
State Reference	TX
Environment
Light	Daylight
Aircraft 1
Make Model Name	Embraer Jet Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR GESNR 1
Flight Plan	IFR
Aircraft 2
Make Model Name	B747 Undifferentiated or Other Model
Flight Phase	Descent
Route In Use	STAR GESNR 1
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

Erj first officer reported a 'moderate to severe' wake turbulence encounter at 14;000 ft on arrival into iah 12 miles in trail of a B747.