As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONCE IN FLIGHT GOT A STRONG SMELL OF FUMES IN FLIGHT DECK. WAS AN ELECTRIC BURNING SMELL. DECIDED IT WAS TO STRONG AND DIVERTED BACK TO JFK. T/S AND FOUND LT WINDOW WIRES P1/P2 BURNED, R&R P1&P2 TERMINALS IAW ESPM 20-16-00. R&R LT WINDOW IAW JC 900-56-900-902, AND R&R LT WINDOW HEAT CONTROLLER IAW AMM 30-41-06, LEAK/OPS CK REQUIRED.