Flight crew executes go around in an A320 due to windshear alert.

Attributes
ACN	550089
Time
Date	200206
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : milit
State Reference	MA
Altitude	msl single value : 420
Environment
Flight Conditions	Mixed
Weather Elements	Turbulence Windshear
Aircraft 1
Controlling Facilities	tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	A320
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 04r other
Flight Phase	descent : approach landing : go around
Route In Use	approach : instrument precision
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : bos.tower
Operator	common carrier : air carrier
Make Model Name	Heavy Transport
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 04r other
Flight Phase	descent : approach
Route In Use	approach : instrument precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial
Experience	flight time last 90 days : 200 flight time total : 4700 flight time type : 1566
ASRS Report	550089
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 225 flight time type : 2403
ASRS Report	550090
Events
Anomaly	inflight encounter : turbulence inflight encounter : wake turbulence non adherence : published procedure non adherence : company policies non adherence : required legal separation other anomaly other anomaly
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance flight crew : overrode automation flight crew : executed missed approach
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Environmental Factor Aircraft ATC Human Performance Flight Crew Human Performance Weather
Primary Problem	Flight Crew Human Performance

Narrative:

Executed go around due to windshear alert, flaps 3 degrees, gear down. No other aircraft reported shear. After completing go around, pressed performance key to activate and confirm approach phase. Captain directed me to perform reverse Z. Looked at flight plan page to confirm approach was in, same with radnav page. Looked at progress page but don't remember changing anything. Did not go to performance page again. On final, captain with autoplt and autothrottle on for possible windshear. Many traffic calls, busy radios. Told maintain 170 KTS, following heavy, and heavy departure before landing. Gear down, flaps 2 degrees. Captain went to managed speed. Aircraft went from 170 KTS to approximately 190 KTS. He stated aircraft wasn't slowing down. Asked if he wanted selected speed, said no. Ran final approach checklist. Captain asked me to select landing confign. Pulled up performance page on mcdu to do so. Noticed aircraft still in go around mode. Activated and confirmed approach phase. Told captain speed should be coming back. At some point he had clicked off autothrottle/autoplt. Got 'too low, terrain' due to flaps 2 degrees. Captain elected to continue. When speed permitted, flaps 3 degrees selected. Speed came back rapidly. I think speed was within 10 KIAS of vapp at touchdown, and I think it was in zone. Exited runway. Proceeded to gate without incident. May not have completed approach activate on downwind, not sure. Maintenance reported both FMGC's needed reset at next power-up.

Original NASA ASRS Text

Title: FLC EXECUTES GAR IN AN A320 DUE TO WINDSHEAR ALERT.

Narrative: EXECUTED GAR DUE TO WINDSHEAR ALERT, FLAPS 3 DEGS, GEAR DOWN. NO OTHER ACFT RPTED SHEAR. AFTER COMPLETING GAR, PRESSED PERFORMANCE KEY TO ACTIVATE AND CONFIRM APCH PHASE. CAPT DIRECTED ME TO PERFORM REVERSE Z. LOOKED AT FLT PLAN PAGE TO CONFIRM APCH WAS IN, SAME WITH RADNAV PAGE. LOOKED AT PROGRESS PAGE BUT DON'T REMEMBER CHANGING ANYTHING. DID NOT GO TO PERFORMANCE PAGE AGAIN. ON FINAL, CAPT WITH AUTOPLT AND AUTOTHROTTLE ON FOR POSSIBLE WINDSHEAR. MANY TFC CALLS, BUSY RADIOS. TOLD MAINTAIN 170 KTS, FOLLOWING HVY, AND HVY DEP BEFORE LNDG. GEAR DOWN, FLAPS 2 DEGS. CAPT WENT TO MANAGED SPD. ACFT WENT FROM 170 KTS TO APPROX 190 KTS. HE STATED ACFT WASN'T SLOWING DOWN. ASKED IF HE WANTED SELECTED SPD, SAID NO. RAN FINAL APCH CHKLIST. CAPT ASKED ME TO SELECT LNDG CONFIGN. PULLED UP PERFORMANCE PAGE ON MCDU TO DO SO. NOTICED ACFT STILL IN GAR MODE. ACTIVATED AND CONFIRMED APCH PHASE. TOLD CAPT SPD SHOULD BE COMING BACK. AT SOME POINT HE HAD CLICKED OFF AUTOTHROTTLE/AUTOPLT. GOT 'TOO LOW, TERRAIN' DUE TO FLAPS 2 DEGS. CAPT ELECTED TO CONTINUE. WHEN SPD PERMITTED, FLAPS 3 DEGS SELECTED. SPD CAME BACK RAPIDLY. I THINK SPD WAS WITHIN 10 KIAS OF VAPP AT TOUCHDOWN, AND I THINK IT WAS IN ZONE. EXITED RWY. PROCEEDED TO GATE WITHOUT INCIDENT. MAY NOT HAVE COMPLETED APCH ACTIVATE ON DOWNWIND, NOT SURE. MAINT RPTED BOTH FMGC'S NEEDED RESET AT NEXT PWR-UP.

Data retrieved from NASA's ASRS site as of July 2007 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.