Narrative:

Departed runway 23R at rdu. Upon positive rate and gear up callout, first officer (PNF) selected the gear handle up. Gear remained down and locked. A master warning activated with a red 'gear disagreement' message. Landing gear handle was cycled with same outcome. The QRH was completed and maintenance contacted. Decision was made to return to rdu. We circled to burn off fuel to our landing weight and proceeded to rdu. Upon being vectored to runway 23L, we received a clearance to 2000 ft MSL. ATC said no conflict had occurred and there must have been a miscom. Flight landed without incident.

Google
 

Original NASA ASRS Text

Title: A CANADAIR CL65 IMMEDIATELY AFTER TKOF DECLARED AN EMER AND RETURNED TO THE FIELD DUE TO INABILITY TO RETRACT THE LNDG GEAR. CAUSE UNKNOWN.

Narrative: DEPARTED RWY 23R AT RDU. UPON POSITIVE RATE AND GEAR UP CALLOUT, FO (PNF) SELECTED THE GEAR HANDLE UP. GEAR REMAINED DOWN AND LOCKED. A MASTER WARNING ACTIVATED WITH A RED 'GEAR DISAGREEMENT' MESSAGE. LNDG GEAR HANDLE WAS CYCLED WITH SAME OUTCOME. THE QRH WAS COMPLETED AND MAINT CONTACTED. DECISION WAS MADE TO RETURN TO RDU. WE CIRCLED TO BURN OFF FUEL TO OUR LNDG WT AND PROCEEDED TO RDU. UPON BEING VECTORED TO RWY 23L, WE RECEIVED A CLRNC TO 2000 FT MSL. ATC SAID NO CONFLICT HAD OCCURRED AND THERE MUST HAVE BEEN A MISCOM. FLT LANDED WITHOUT INCIDENT.

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.