An MD88 on approach to atl received a GPWS terrain alert when they were too low for their flap confi...

Attributes
ACN	705549
Time
Date	200608
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	agl single value : 1000
Environment
Flight Conditions	Marginal
Weather Elements	Rain
Light	Dusk
Aircraft 1
Controlling Facilities	tower : atl.tower
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach
Route In Use	approach : circling
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : instrument pilot : flight engineer pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 210 flight time total : 5000 flight time type : 2000
ASRS Report	705549
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	non adherence : company policies other anomaly other spatial deviation
Independent Detector	aircraft equipment : gpws
Resolutory Action	controller : issued new clearance flight crew : executed go around
Supplementary
Problem Areas	Flight Crew Human Performance Weather Airport
Primary Problem	Flight Crew Human Performance

Narrative:

Landing with a tailwind on runway 27R sidestep to runway 27L in atl; an approach I am not familiar with. Winds were a quartering tailwind 140 degrees at 18 KTS gusting to 28 KTS. The captain was very busy calculating the tailwind component to see if we were legal. At the OM; he was still busy; so to help him out or free him up to do the calculations I put the gear down myself. This took him out of the loop; changed a normal pattern -- none of which was good. We got a 'GS' warning -- due to the original ILS from which I was sidestepping from. I was busy lining up on the correct runway in lowered visibility due to the light rain and setting sun. The GPWS started calling 'terrain; terrain' due to the landing checklist not being completed. The flaps were not in landing confign. We did a go around to an uneventful landing. The biggest lesson is not to get -- or put -- anyone out of the loop and not to deviate from normal habit patterns.

Original NASA ASRS Text

Title: AN MD88 ON APCH TO ATL RECEIVED A GPWS TERRAIN ALERT WHEN THEY WERE TOO LOW FOR THEIR FLAP CONFIGN.

Narrative: LNDG WITH A TAILWIND ON RWY 27R SIDESTEP TO RWY 27L IN ATL; AN APCH I AM NOT FAMILIAR WITH. WINDS WERE A QUARTERING TAILWIND 140 DEGS AT 18 KTS GUSTING TO 28 KTS. THE CAPT WAS VERY BUSY CALCULATING THE TAILWIND COMPONENT TO SEE IF WE WERE LEGAL. AT THE OM; HE WAS STILL BUSY; SO TO HELP HIM OUT OR FREE HIM UP TO DO THE CALCULATIONS I PUT THE GEAR DOWN MYSELF. THIS TOOK HIM OUT OF THE LOOP; CHANGED A NORMAL PATTERN -- NONE OF WHICH WAS GOOD. WE GOT A 'GS' WARNING -- DUE TO THE ORIGINAL ILS FROM WHICH I WAS SIDESTEPPING FROM. I WAS BUSY LINING UP ON THE CORRECT RWY IN LOWERED VISIBILITY DUE TO THE LIGHT RAIN AND SETTING SUN. THE GPWS STARTED CALLING 'TERRAIN; TERRAIN' DUE TO THE LNDG CHKLIST NOT BEING COMPLETED. THE FLAPS WERE NOT IN LNDG CONFIGN. WE DID A GAR TO AN UNEVENTFUL LNDG. THE BIGGEST LESSON IS NOT TO GET -- OR PUT -- ANYONE OUT OF THE LOOP AND NOT TO DEVIATE FROM NORMAL HABIT PATTERNS.

Data retrieved from NASA's ASRS site as of January 2009 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 MD88 on approach to atl received a GPWS terrain alert when they were too low for their flap confign.