B757 flight crew encountered wake turbulence in trail of an A320 on approach to den. When the result...

Attributes
ACN	1069800
Time
Date	201302
Local Time Of Day	1201-1800
Place
Locale Reference	DEN.Airport
State Reference	CO
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Aircraft 2
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Person 1
Function	Captain Pilot Flying
Experience	Flight Crew Last 90 Days 180 Flight Crew Total 24000 Flight Crew Type 7000
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 16000 Flight Crew Type 2800
Events
Anomaly	Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence

Narrative:

We were set up for an autoland approach to 35R at den. All three autopilots were engaged. Weather was 1/4 mile light snow. We were about 4 miles behind an airbus approaching the outer marker when we encountered wake turbulence. Aircraft rolled about 40 degrees to the left. Captain disengaged the autopilot and rolled back to join the localizer. We determined that we were not in a position to continue the approach so first officer called the tower and said we were going around. ATC vectored us around for an approach to 35L. We were cleared to 8;000 ft. We were at flaps 5; 190 KTS. On the downwind leg ATC gave us a heading of 350. When we rolled out captain noticed that this heading would have us join the localizor after the FAF. Before we had a chance to question the heading; ATC vectored us left to a 170 heading; climb to 8;500 ft. Finally we were instructed to climb to 9;000 ft. ATC was very busy with several aircraft and approaches to 35R; 35L and 34R. There seemed to be some confusion with vectoring us to fit in with the flow. We finally were cleared for the ILS to 35L and landed 6 miles in trail of another plane.

Original NASA ASRS Text

Title: B757 flight crew encountered wake turbulence in trail of an A320 on approach to DEN. When the resultant roll took them off course they executed a go around and were vectored to another approach.

Narrative: We were set up for an autoland approach to 35R at DEN. All three autopilots were engaged. Weather was 1/4 mile light snow. We were about 4 miles behind an Airbus approaching the outer marker when we encountered wake turbulence. Aircraft rolled about 40 degrees to the left. Captain disengaged the autopilot and rolled back to join the localizer. We determined that we were not in a position to continue the approach so First Officer called the Tower and said we were going around. ATC vectored us around for an approach to 35L. We were cleared to 8;000 FT. We were at flaps 5; 190 KTS. On the downwind leg ATC gave us a heading of 350. When we rolled out Captain noticed that this heading would have us join the localizor after the FAF. Before we had a chance to question the heading; ATC vectored us left to a 170 heading; climb to 8;500 FT. Finally we were instructed to climb to 9;000 FT. ATC was very busy with several aircraft and approaches to 35R; 35L and 34R. There seemed to be some confusion with vectoring us to fit in with the flow. We finally were cleared for the ILS to 35L and landed 6 miles in trail of another plane.

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.

B757 flight crew encountered wake turbulence in trail of an A320 on approach to den. When the resultant roll took them off course they executed a go around and were vectored to another approach.