FLC OF EMB120 HAS AURAL WARNING REGARDING TRIM ON TKOF ROLL. THEY ABORT THE TKOF.

Narrative

ON THE FIRST DAY OF A 3 DAY TRIP WE HAD AN ACFT CHANGE AT OUR HOME BASE (MCO). THIS WAS A QUICK TURN WITH APPROX 35 MINS TO MAKE THE SWAP. THE CAPT PERFORMED THE PREFLT WHILE I RETRIEVED THE DISPATCH RELEASE. UPON RETURNING TO THE ACFT; THE CAPT INFORMED ME OF A POSSIBLE HYD LEAK; #1 ENG. WHILE MAINT CHKED OUT THIS PROB; I PERFORMED INTERIOR CHKLISTS STARTING FROM THE TOP WITH ACFT ACCEPTANCE CHK. EVERYTHING CHKED OUT OK EXCEPT FOR TKOF AURAL WARNING CHK; WHICH GAVE A TRIM OUT OF TKOF RANGE; WITH THE TRIM IN THE GREEN ARC. I POINTED THIS OUT TO THE CAPT WHEN HE ARRIVED; AND HE RAN THE TRIM FULL FORWARD AND FULL AFT. HE BRIEFED A POSSIBLE TRIM PROB ON TKOF. ELECTRIC PITCH APPEARED TO OPERATE NORMALLY. WE BOARDED PAX AND TAXIED FOR TKOF. THE CAPT WAS THE PF; AND UPON THE TKOF ROLL; AFTER BRINGING THE PWR LEVERS FORWARD WE RECEIVED THE TKOF AURAL WARNING THAT THE TRIM WAS NOT SET FOR TKOF. (IT WAS.) WE ABORTED THE TKOF AND RETURNED TO THE GATE. MAINT QUICKLY DISCOVERED THE REAL CAUSE OF THE DISCREPANCY. THE ACFT HAD COME FROM THE HANGAR WHERE GEAR SWINGS HAD BEEN PERFORMED. THE TKOF AURAL WARNING AND HOBBS CIRCUIT BREAKERS HAD BEEN PULLED. BOTH MAINT; THE CREW THAT TAXIED THE PLANE FROM THE HANGAR; AS WELL AS OUR CREW MISSED THIS. CONTRIBUTING FACTORS WERE THE FACT THAT POPPED CIRCUIT BREAKERS ARE DIFFICULT TO DETECT VISUALLY IN THIS ACFT. A BETTER METHOD IS TO STAND ON JUMP SEAT AND LOOK DOWN ON PANEL; OR USE HANDS FOR A TACTILE CHK. ADDITIONALLY; AS THE FO ON THIS FLT I SHOULD HAVE POINTED OUT MY DISPLEASURE WITH CAPT'S DECISION TO TAXI FOR TKOF WITH AN UNEXPLAINED ERRONEOUS AURAL WARNING. MAINT SHOULD HAVE BEEN CALLED BACK OUT TO TROUBLESHOOT THIS PROB PRIOR TO PUSHBACK.