An airbus pilot on a dca runway 19 river visual approach executed a go-around after the airspeed dro...

Attributes
ACN	976769
Time
Date	201110
Local Time Of Day	0601-1200
Place
Locale Reference	DCA.Airport
State Reference	DC
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Airbus 318/319/320/321 Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Unstabilized Approach Inflight Event / Encounter Weather / Turbulence

Narrative:

On a river visual approach to dca runway 19; wind [from] 220 [degrees at] 14 KTS; at 300 ft on final the airplane's airspeed drop below vls; so I executed missed approach with toga thrust. A weather front was moving in from the west and we had experienced light to moderate chop on final approach. I know I turned off the autopilot; but not sure that we turned off both flight directors on the approach. That's the only thing I can think of causing the autoflight system to act the way it did. By the time of the go-around we were in toga lock with the auto-thrust. We broke down the pyramid and then rebuilt it. Multiple causes: busy airport; windy conditions; improper use of autoflight systems.

Original NASA ASRS Text

Title: An Airbus pilot on a DCA Runway 19 River visual approach executed a go-around after the airspeed dropped below Vls during turbulance and the autothrust unexpectedly transitioned to TOGA LOCK.

Narrative: On a River visual approach to DCA Runway 19; wind [from] 220 [degrees at] 14 KTS; at 300 FT on final the airplane's airspeed drop below Vls; so I executed missed approach with TOGA thrust. A weather front was moving in from the west and we had experienced light to moderate chop on final approach. I know I turned off the autopilot; but not sure that we turned off both flight directors on the approach. That's the only thing I can think of causing the autoflight system to act the way it did. By the time of the go-around we were in TOGA LOCK with the auto-thrust. We broke down the pyramid and then rebuilt it. Multiple causes: busy airport; windy conditions; improper use of autoflight systems.

Data retrieved from NASA's ASRS site as of April 2012 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.

An airbus pilot on a dca runway 19 river visual approach executed a go-around after the airspeed dropped below vls during turbulance and the autothrust unexpectedly transitioned to toga lock.