A B737 crew, departing mia, experienced a leading edge device flap asymmetry condition.

Attributes
ACN	554337
Time
Date	200207
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl single value : 7000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mia.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	554337
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : le flap indicator other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : landed in emergency condition flight crew : diverted to another airport flight crew : declared emergency
Consequence	other other Other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

After takeoff from mia, flaps were selected to 'up' position. Trailing flaps came up, but leading edge device stayed in the 'out' position. Cycled flaps to 1 degree then back to the 'up' position with same results as before. Put flaps back out to 10 degrees then back up to 5 degrees, to 1 degree and finally 0 degrees. This caused the leading edge device to become asymmetrical. Went through the appropriate checklist, declared an emergency for an overweight landing, and returned to mia. We set up for a 15 degree landing and landed on runway 27L. Crash fire rescue equipment looked us over and we taxied back to the gate.

Original NASA ASRS Text

Title: A B737 CREW, DEPARTING MIA, EXPERIENCED A LEADING EDGE DEVICE FLAP ASYMMETRY CONDITION.

Narrative: AFTER TKOF FROM MIA, FLAPS WERE SELECTED TO 'UP' POS. TRAILING FLAPS CAME UP, BUT LEADING EDGE DEVICE STAYED IN THE 'OUT' POS. CYCLED FLAPS TO 1 DEG THEN BACK TO THE 'UP' POS WITH SAME RESULTS AS BEFORE. PUT FLAPS BACK OUT TO 10 DEGS THEN BACK UP TO 5 DEGS, TO 1 DEG AND FINALLY 0 DEGS. THIS CAUSED THE LEADING EDGE DEVICE TO BECOME ASYMMETRICAL. WENT THROUGH THE APPROPRIATE CHKLIST, DECLARED AN EMER FOR AN OVERWT LNDG, AND RETURNED TO MIA. WE SET UP FOR A 15 DEG LNDG AND LANDED ON RWY 27L. CFR LOOKED US OVER AND WE TAXIED BACK TO THE GATE.

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.