Injury During Overhaul of Main Engine Fuel Pump

During the overhauling to M/E unit 1 fuel pump, the fitter had burn injuries in his left hand palm and the face.
The main cause is due to non following of the proper procedure.
Tool box meeting carried out. 2/E thought he, had given all safety instructions, but he forgot to tell that the fuel pump had to be drained, as it contained hot fuel oil. Fitter also did not confirm this, and when he started slackening the top cover, F.O sprayed on to his face and the palm of the left hand.