What was found
RE-SUBMISSION OF SDR BASED ON ENGINE FINAL REPORT. DURING CLIMB JUST AFTER TAKE OFF CREW NOTICED A WHITE SMOKE FILLING THE COCKPIT AND CABIN. CHECK LIST FOLLOWED, EMERGENCY DECLARED, AND UNSCHEDULED LANDING PERFORMED WITHOUT INCIDENT. MAINTENANCE EVALUATION SUSPECT BOTH ENGINES AS SOURCE AND ENGINES REMOVED FOR INVESTIGATION. BASED ON THE ROOT CAUSE ANALYSIS THERE WAS NO FUNCTIONAL MALFUNCTION OR MECHANICAL DETERIORATION OF THE ENGINE RESULTING IN THE SUBJECT EVENT. THE MOST LIKELY CAUSE FOR THE EVENT IS A PARTIAL BLOCKAGE OF THE BREATHER OUTLET. THE CAUSE FOR A POTENTIAL BLOCKAGE COULD NOT BE DETERMINED.