What was found
BURNING PLASTIC ODOR WHEN MODE CONTROLLER & BLOWERS ON. MAINTENANCE REMOVED FLOORBOARDS OVER THE FORWARD AND AFT VENT BLOWERES. FOUND BLOWERS TO OPERATE. RE-INSTALLED FLOORBOARDS. REMOVED FLOORBOARD COVERING FLAP MOTOR, GEARBOX, AND FLAP RELAY. NOTICED AN ABNORMAL BURN ODOR . OPERATED FLAPS AND THEY DID WORK. TAPPED ON THE FLAP MOTOR AND FLAPS STILL DID WORK. REMOVED FLAP RELAY MOUNTING SCREWS AND FLAP RELAY WIRES. RE-ATTACHED WIRING. MAINTENANCE REMOVED AND REPLACED THE FLAP RELAY. RE-NSTALLED SCREWS AND RE-ATTACHED WIRES TO TERMINALS. MAINTENANCE OPERATED FLAPS SEVERAL TIMES WITH NO FAILURES NOTED. NO ELECTRICAL ODOR NOTED.