What was found
DURING CLIMB BETWEEN FL 270 & FL 350 BOTH CAPTAIN & FIRST OFFICER STARTED SMELLING WHAT APPEARED TO BE ELEC BURNING. CALLED FLIGHT ATTENDANT & SHE SMELLED IT TOO. AT FL 350 SMOKE STARTED COMING OUT OF THE FWD SIDE OF BOTH DV WINDOWS. THE ON SHORT FINAL BOTH RMU FAILED & COME BACK UP AGAIN. FLIGHT CONDITIONS AT ALTITUDE WERE BUMPY & IMC WITH SOME RAIN. PERFORMED ENG RUNS IAW AMM 71-00-01 & COMPLIED WITH ETN- EM-72-034, NO SMELL DETECTED IN THE COCKPIT AT THIS TIME. OPERATIONS CHECKED GOOD.