What was found
SIX MINUTES AFTER DEPARTURE, CLIMBING THRU 14,000 FT, WE NOTICED AN INTENSE BURNING ODOR. FLIGHT ATTENDANT SAW HAZE IN GALLEY & COCKPIT, SHE ALSO NOTICED SMOKE COMING OUT OF WEMACS. FOUND ECU WAS CONTAMINATED WITH OIL FROM OVER SERVICED APU. REMOVED ECU PACK PN 3511A020000, SN 00248 & INSTALLED A REPAIRED UNIT PN 3511A020000, SN 00447 IAW F-2000 AMM 21-52-05-900-801. RAN APU & A/C SYS, OPERATIONS & LEAK CHECKED GOOD.