What was found
CLIMBING THROUGH 10,000 FT, SMELLED A BURNING PLASTIC SMOKE, UP TO 20,000 FT. DURING DESCENT THROUGH 14,000 FT, THE ODOR DISAPPEARED. MAINTENANCE PERFORMED TROUBLESHOOTING OF SURROUNDING AREAS AND CHECKED WIRES FOR ANY BURN INDICATIONS, UNABLE TO SEE ANY BURNED PLASTIC. PERFORMED ENGINE RUNS, OPERATED BLOWER MOTORS, ACM, HEAT AND AVIONICS, NO DISCREPANCIES OR ODD ODORS NOTED.