B777-200 crew was unable to retract the main gear after takeoff at dfw.

Attributes
ACN	564047
Time
Date	200210
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	agl bound lower : 0 agl bound upper : 10000
Aircraft 1
Controlling Facilities	tracon : d10.tracon tower : ord.tower
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure sid : ns
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	564047
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 expanded lnd gear position display other flight crewa other flight crewb
Resolutory Action	flight crew : diverted to another airport flight crew : landed in emergency condition flight crew : declared emergency none taken : detected after the fact other
Consequence	other other Other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Returned to dfw because of gear malfunction. After takeoff, the main landing gear would not retract the gear handle was recycled as per maintenance, but main gear still would not come up. We returned to dfw and landed overweight. An emergency was declared and we landed with no incident. Callback conversation with reporter revealed the following information: the aircraft had just come from heavy maintenance. Maintenance reported a gear sequencing computer prevented main gear operation. The lever latch did not prevent gear handle operation. The flight changed aircraft and operated late.

Original NASA ASRS Text

Title: B777-200 CREW WAS UNABLE TO RETRACT THE MAIN GEAR AFTER TKOF AT DFW.

Narrative: RETURNED TO DFW BECAUSE OF GEAR MALFUNCTION. AFTER TKOF, THE MAIN LNDG GEAR WOULD NOT RETRACT THE GEAR HANDLE WAS RECYCLED AS PER MAINT, BUT MAIN GEAR STILL WOULD NOT COME UP. WE RETURNED TO DFW AND LANDED OVERWT. AN EMER WAS DECLARED AND WE LANDED WITH NO INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE ACFT HAD JUST COME FROM HEAVY MAINT. MAINT REPORTED A GEAR SEQUENCING COMPUTER PREVENTED MAIN GEAR OPERATION. THE LEVER LATCH DID NOT PREVENT GEAR HANDLE OPERATION. THE FLIGHT CHANGED ACFT AND OPERATED LATE.

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.