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Overall walk-around of the fuel additive blender unit's heater assembly.

Picture 3 of 4.

This would ordinarily be mounted around the FABU to keep the FABU's Oronite additive warm enough to provide proper lubricative properties, guarding against the cold of the liquid oxygen.

After being exposed to the elements for some 50 years, the heater assembly's normal bright red color has faded to almost a pink color.