What was found
(CAN) PERFORMING AN AERO SEQUENCE, UPON INITIATING FINAL MANOUVER, SMOKE WAS DETECTED AND A SMALL AMOUNT SEEN BY PILOT, LT SEAT, COMING FROM THE CIRCUIT BREAKER PANEL AREA. THE ACFT RETURNED TO BASE WITHOUT INCIDENT. MAINTENANCE INVESTIGATION REVEALED THAT 1 OF THE CIRCUIT BREAKERS ALONG THE BOTTOM ROW OF BREAKERS HAD MADE CONTACT WITH THE CARBON LIP OF THE LOWER DASH SUPPORT BEAM.