B737 flight crew reported severe turbulence in the initial stages of the approach for landing.

Attributes
ACN	1607372
Time
Date	201901
Local Time Of Day	1801-2400
Place
Locale Reference	HOU.Airport
State Reference	TX
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 223
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 391 Flight Crew Type 2400
Events
Anomaly	Deviation - Speed All Types Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

On arrival into houston; we encountered severe turbulence between 4000 - 5000 feet 10 miles northwest of carco; which is on the ILS 4 approach plate into houston. We were at 250 knots and our speed was uncontrollable and went to 280 knots for a period of time. The controller asked what our speed was and I responded that we were trying to get it back to 250 knots but the turbulence was making it difficult. The airplane also went past 30 degrees bank and we got the 'bank angle' call out. It was very rough and we gave a PIREP and wrote the airplane up when we were on the ground.a previous airplane told ATC that they encountered severe turbulence; on a previous frequency. I questioned ATC where that plane was and the controller said he did not hear that. Other airplanes also chimed in about the severe turbulence report. Unfortunately; the controller didn't hear and did not attempt to find out from the plane that he just switched over to another frequency to find out details. I did tell the controller that it was the airplane who he just gave a frequency change to that reported it.

Original NASA ASRS Text

Title: B737 flight crew reported severe turbulence in the initial stages of the approach for landing.

Narrative: On arrival into Houston; we encountered severe turbulence between 4000 - 5000 feet 10 miles northwest of CARCO; which is on the ILS 4 approach plate into Houston. We were at 250 knots and our speed was uncontrollable and went to 280 knots for a period of time. The Controller asked what our speed was and I responded that we were trying to get it back to 250 knots but the turbulence was making it difficult. The airplane also went past 30 degrees bank and we got the 'Bank Angle' call out. It was very rough and we gave a PIREP and wrote the airplane up when we were on the ground.A previous airplane told ATC that they encountered severe turbulence; on a previous frequency. I questioned ATC where that plane was and the Controller said he did not hear that. Other airplanes also chimed in about the severe turbulence report. Unfortunately; the Controller didn't hear and did not attempt to find out from the plane that he just switched over to another frequency to find out details. I did tell the Controller that it was the airplane who he just gave a frequency change to that reported it.

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.