B757 flight crew has flap asymmetry, declares emergency.

Attributes
ACN	557828
Time
Date	200208
Day	Sat
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : msp.airport
State Reference	MN
Altitude	msl single value : 5000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : m98.tracon tracon : iad.tracon
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 112 flight time total : 5500 flight time type : 2200
ASRS Report	557828
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 : eicas indication other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : declared emergency flight crew : diverted to another airport flight crew : landed in emergency condition
Consequence	faa : reviewed incident with flight crew other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On departure from msp airport, a trailing edge flap asymmetry condition occurred while attempting to raise the flaps. The QRH was used to identify the non normal procedures and work the problem. The procedure had us actuate the ground proximity flap override switch and adjust our xref speed to compensate for the flaps stuck in a split condition. Our company was called to verify the procedures with the maintenance coordinator and to determine a suitable divert airport. Ord was determined to be the most suitable because of its close proximity and long runway (13000 ft for runway 14R). Flight attendants and passenger were briefed and the aircraft landed safely and uneventfully on runway 14R. An emergency was declared for these reasons: 1) the flaps were split (one at 8 degrees and the other at 14 degrees). 2) landing flaps could not be used. 3) the added higher airspeed on final. 4) increase landing roll due to the excessive speed.

Original NASA ASRS Text

Title: B757 FLC HAS FLAP ASYMMETRY, DECLARES EMER.

Narrative: ON DEP FROM MSP ARPT, A TRAILING EDGE FLAP ASYMMETRY CONDITION OCCURRED WHILE ATTEMPTING TO RAISE THE FLAPS. THE QRH WAS USED TO IDENT THE NON NORMAL PROCS AND WORK THE PROB. THE PROC HAD US ACTUATE THE GND PROX FLAP OVERRIDE SWITCH AND ADJUST OUR XREF SPD TO COMPENSATE FOR THE FLAPS STUCK IN A SPLIT CONDITION. OUR COMPANY WAS CALLED TO VERIFY THE PROCS WITH THE MAINT COORDINATOR AND TO DETERMINE A SUITABLE DIVERT ARPT. ORD WAS DETERMINED TO BE THE MOST SUITABLE BECAUSE OF ITS CLOSE PROX AND LONG RWY (13000 FT FOR RWY 14R). FLT ATTENDANTS AND PAX WERE BRIEFED AND THE ACFT LANDED SAFELY AND UNEVENTFULLY ON RWY 14R. AN EMER WAS DECLARED FOR THESE REASONS: 1) THE FLAPS WERE SPLIT (ONE AT 8 DEGS AND THE OTHER AT 14 DEGS). 2) LNDG FLAPS COULD NOT BE USED. 3) THE ADDED HIGHER AIRSPD ON FINAL. 4) INCREASE LNDG ROLL DUE TO THE EXCESSIVE SPD.

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.