A B737-800 with an asymmetrical flap warning on approach. An emergency was declared followed by a la...

Attributes
ACN	820840
Time
Date	200901
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Marginal
Aircraft 1
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach Landing
Flight Plan	IFR
Component
Aircraft Component	Flap/Slat Control System
Person 1
Function	First Officer Pilot Flying
Experience	Flight Crew Last 90 Days 175 Flight Crew Total 14000 Flight Crew Type 7800
Person 2
Function	Captain Pilot Not Flying
Experience	Flight Crew Last 90 Days 195 Flight Crew Total 10000 Flight Crew Type 7000
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

The flight was uneventful until approaching the FAF to ZZZ. I was flying and asked for flaps and the indicators split at 1 degree for the right flap and 1 degree for the left flap. We went around to troubleshoot the problem. We went through the flight manual and pulled the circuit breaker and matched up the flaps. We then ran the 'flaps asymmetrical trailing edge' checklist. We also ran the 'flaps -- no trailing edge' checklist as directed. Dispatch checked landing distances for us. We declared an emergency; had the fire department standing by; did a cabin advisory; and landed uneventfully on runway xx in ZZZ. Landing picture was significantly high and the airplane wanted to float; but touchdown was in the normal zone and autobrakes were set to one because of the higher approach and touchdown speeds. We taxied to the gate with the flaps left as they were for maintenance to troubleshoot.

Original NASA ASRS Text

Title: A B737-800 with an asymmetrical flap warning on approach. An emergency was declared followed by a landing after completing the appropriate checklists.

Narrative: The flight was uneventful until approaching the FAF to ZZZ. I was flying and asked for flaps and the indicators split at 1 degree for the right flap and 1 degree for the left flap. We went around to troubleshoot the problem. We went through the flight manual and pulled the CB and matched up the flaps. We then ran the 'Flaps Asymmetrical Trailing Edge' checklist. We also ran the 'Flaps -- No Trailing Edge' checklist as directed. Dispatch checked landing distances for us. We declared an emergency; had the Fire Department standing by; did a cabin advisory; and landed uneventfully on Runway XX in ZZZ. Landing picture was significantly high and the airplane wanted to float; but touchdown was in the normal zone and autobrakes were set to one because of the higher approach and touchdown speeds. We taxied to the gate with the flaps left as they were for Maintenance to troubleshoot.

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.