B727 flight crew declared an emergency during final approach after the split flap warning came on when lowering the flaps. Successful landing was made with partially split flaps.

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Attributes
ACN	505563
Time
Date	200103
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cvg.airport
State Reference	KY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cvg.tower
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach landing : go around
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	505563
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : landed in emergency condition flight crew : declared emergency flight crew : executed go around
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On final approach to runway 36L, first officer flying asked for flaps 25 degrees. Outbound flap gauge split with one showing 15 degrees and the other showing 20 degrees. Made go around, contacted dispatch and patched. Maintenance tried bringing flaps up and back as per maintenance instruction no help. Followed checklist for asymmetric outboard flaps, declared emergency, prepped cabin, and landed without further incident.

Original NASA ASRS Text

Title: B727 FLC DECLARED AN EMER DURING FINAL APCH AFTER THE SPLIT FLAP WARNING CAME ON WHEN LOWERING THE FLAPS. SUCCESSFUL LNDG WAS MADE WITH PARTIALLY SPLIT FLAPS.

Narrative: ON FINAL APCH TO RWY 36L, FO FLYING ASKED FOR FLAPS 25 DEGS. OUTBOUND FLAP GAUGE SPLIT WITH ONE SHOWING 15 DEGS AND THE OTHER SHOWING 20 DEGS. MADE GAR, CONTACTED DISPATCH AND PATCHED. MAINT TRIED BRINGING FLAPS UP AND BACK AS PER MAINT INSTRUCTION NO HELP. FOLLOWED CHKLIST FOR ASYMMETRIC OUTBOARD FLAPS, DECLARED EMER, PREPPED CABIN, AND LANDED WITHOUT FURTHER INCIDENT.

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.