What was found
CABIN DOOR REMOVED TO CHANGE BEARING ASSYS IN DOOR HINGE AND CORROSION DAMAGE WAS DISCOVERED IN HINGE. THIS IS MADE OF MAGNESIUM AND THE CORROSION DAMAGE WOULD NOT BE REMOVED WITHOUT COMPROMISING THE HINGE INTEGRITY. REASON FOR CORROSION WAS LACK OF LUBRICATION IN THE BEARINGS. THE LUBRICATION WAS NOT CALLED OUT IN THE INSPECTION GUIDE ALTHOUGH LUBE FOR LANDING GEAR TORQUE LINKS IS. THIS CAUSED THE LUBE TO BE OVERLOOKED UNTIL IT WAS TOO LATE.