EMB145 flight crew has an EICAS landing gear disagreement warning after takeoff.

Attributes
ACN	704439
Time
Date	200607
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	msl single value : 1000
Aircraft 1
Controlling Facilities	tracon : c90.tracon
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	climbout : takeoff climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	704439
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
ASRS Report	704438
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb
Resolutory Action	flight crew : landed as precaution flight crew : diverted to another airport
Consequence	other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

On initial climb received 'landing gear/lever disagreement' EICAS warning. Landing gear did not retract. Performed engineering authority/authorized procedures and required communications. Maintenance did not have any suggestions other than engineering authority/authorized checklist. Air turn-back to ord after burning fuel to normal landing weight. Suspect cause was electric override switch in 'doors' position; maintenance still inspecting aircraft for any deficiency.

Original NASA ASRS Text

Title: EMB145 FLT CREW HAS AN EICAS LNDG GEAR DISAGREEMENT WARNING AFTER TKOF.

Narrative: ON INITIAL CLB RECEIVED 'LNDG GEAR/LEVER DISAGREEMENT' EICAS WARNING. LNDG GEAR DID NOT RETRACT. PERFORMED ENGINEERING AUTH PROCS AND REQUIRED COMS. MAINT DID NOT HAVE ANY SUGGESTIONS OTHER THAN ENGINEERING AUTH CHKLIST. AIR TURN-BACK TO ORD AFTER BURNING FUEL TO NORMAL LNDG WT. SUSPECT CAUSE WAS ELECTRIC OVERRIDE SWITCH IN 'DOORS' POS; MAINT STILL INSPECTING ACFT FOR ANY DEFICIENCY.

Data retrieved from NASA's ASRS site as of January 2009 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.