ACTION ON BOARD OF A FOURTH ENGINEER IF OIL MIST DETECTOR (OMD) ACTIVATES.

BELOW IS A STANDARD PROCEDURE OF WHAT TO DO IN THIS KIND OF SCENARIO

1. INFORM THE WHEEL HOUSE OF THE SITUATION.
2. PRESS ENGINEERS CALL ALARM TO CALL ALL ENGINEERS ON BOARD.
3. AS SOON AS POSSIBLE STOP THE ENGINE.
4. MAKE SURE NOT TO STOP LUBRICATING OIL PUMP.
5. IF FUEL PUMP FOR THE MAIN AND AUXILIARY ENGINE ARE SEPARATE THEN STOP THE FUEL OIL PUMP.
6. OPEN VENTILATION TO RUN WHICH CREATES A VACUUM INSIDE CRANK CASE.
7. DO NOT STAND IN FRONT OF CRANK CASE DOOR
8. CONNECT ALL FIRE HOSES AND MAKE SURE ALL FIRE FIGHTING EQUIPMENT ARE READY.
9. LEAVE ENGINE ROOM FOR SOME TIME.
10. COME DOWN TO ENGINE ROOM AFTER ABOUT 1 HOUR SO THAT ENGINE HAVE ENOUGH TIME TO BE ABLE TO COOL DOWN.
11. AS YOU ENTER ENGINE ROOM CHECK THE CONDITION OF CRANK CASE DOOR IF THE CRANK CASE DOOR IS STILL TOO HOT IT IS ADVISED NOT TO OPEN THE DOOR AT THAT INSTANT.
12. IF CRANK CASE DOOR IS NOT TOO HOT OPEN THE DOOR BUT MAKE SURE YOU CRACK OPEN THE DOOR JUST TO CONFIRM THERE IS NO PRESSURE INSIDE CRANK CASE AND TAKE EXTREME CAUTION BECAUSE THERE IS CHANCES OF SECONDARY EXPLOSION.
13. IF THERE SEEMS TO BE NO PROBLEM AFTER OPENING OF CRANK CASE DOOR AND THEN VENTILATE THE CRANK CASE FULLY BEFORE MAN ENTRY INTO THE CRANK CASE.
14. IF ANY BEARING TEMPERATURE IS HIGH IT GIVES OUT SOME WHITE METAL WHICH GIVES YOU THE INDICATION OF HOT SPOT.
15. ENTER INTO CRANKCASE BY TAKING TORCH WITH YOU, IF YOU FIND BLUISH TINT ON THE SURFACE THAT WAS THE HOT SPOT AND DUE TO LUBE OIL QUENCHING ACTION IT HAS CHANGED ITS COLOR.
16. AFTER COMPLETION OF INSPECTION IF YOU DID NOT FIND ANY ABNORMALITY, CHECK WHETHER ALL OIL MIST DETECTOR ALARM  ARE WORKING SATISFACTORY AND WHETHER THE GENERATED ALARM WAS FALSE ALARM OR NOT.
17. START THE ENGINE AND SLOWLY INCREASE THE SPEED AND DO CONTINUOUS MONITORING

POSSIBLE CAUSES OF GENERATION OF HOT SPOT

• TOO MUCH CLEARANCE BETWEEN THE BEARING SO OIL FILM MAY BREAKDOWN.
• CRANKSHAFT IS NOT PROPERLY ALIGNED.
• STUFFING BOX NOT ABLE TO SEAL PROPERLY.
• IF PISTON CROWN CRACK THEN EXHAUST GAS MAY LEAK TO THE CRANKCASE.
• IN MAN B&W IF CHAIN IS TOO LOOSE OR TOO TIGHT THEN CHAIN MAY RUN HOT WHICH MAY ACT AS A HOT SPOT.
• IF MATCHING GEAR DOES NOT HAVE A PROPER BACKLASH THEN LUBRICATION IS NOT SO EFFECTIVE AND GENERATE A HOT SPOT.
• CIRCULATION OF LUBE OIL IS NOT PROPER.