What was found
ACRID FOUL SMELLING SMOKE PERMEATED CABIN, ENVIROMENTAL TEMP CIRCUIT BREAKER POPPED. DECLARED EMERGENCY AND DIVERTED. SMOKE DISSIPATED. CABIN TEMP INCREASED BECAUSE FORWARD AND AFT BLOWER MOTORS WERE INOPERATIVE. DID NOT REQUEST CRASH EQUIPMENT. LANDED UNEVENTFULLY. MECHANIC COULD NOT DUPLICATE AFTER 30 MINUTE RUN UP WITH CREW PRESENT. ALL SYSTEMS OPERATING. AIRCRAFT RETURNED TO AIRWORTHY CONDITION.