What was found
160 NAUTICAL MILES NORTH, FLIGHT CREW REPORTED A MIST AND AN ACRID SMELL IN THE CABIN. FLIGHT WAS THEN DECLARED AN EMERGENCY AND IS DIVERTING. ENGINE INSTALL IN PROGRESS IAW SHEETS. ON ENGINE INSTALL CONNECTED SPRING STRUT TO ENGINE TORQUED AND SAFTIED. COMPLETED ENGINE RIGGING TORQUED, LOCKWIRED AND COTTER PINNED. COMPLETED SPRING STRUT TO ENGINE RIGGING PROPELLOR TORQUED AND SAFETY. DUAL CARRIED OUT ENG. INSTALL AND ALL GROUND RUN FUNCTION AND LEAK CHECKS COMPLETED IAW LMF135, LMF011 PWR. ASSURANCE RUN COMPLETED, CHECKED SERVICEABLE.