Lufthansa B744 near Halifax on May 3rd 2014, electrical odour

A Lufthansa Boeing 747-400, registration D-ABVO performing flight LH-423 from Boston,MA (USA) to Frankfurt/Main (Germany), was enroute at FL370 about 280nm eastsoutheast of Halifax,NS (Canada) when the crew requested to return to Boston due to an electrical odour on board. The aircraft descended to FL360 and landed safely back in Boston about 105 minutes after turning around.

The airline reported a strong electrical odour in a galley prompted the return to Boston. A defective coffeemaker was identified as cause of the odour.