What was found
AFTER LIFTOFF AND AFTER TOUCHDOWN BOTH A SMOKE/SULPHUR ODOR IN COCKPIT, ALSO NOTED IN FWD GALLEY AREA. POSSIBLE COOLING FAN ONLY LASTED APPROX 5 SECS. APU WAS OFF. T/S PER AMM WITH PACKS RUNNING PULLED AND RESET C/B H18 EQUIP COOLING SUPP FAN 1. AFTER RESET GOT SULPHUR ODOR FOR 10 TO 20 SECS THEN STOPPED. FWD EQUIP COOLING SUPPLY FAN TO MCO AND PLACARD PER MEL 21-58-03. MTC PROCEDURE C/W CB H18 PULLED AND SECURED. SYS IN STDBY. ETOPS CATEGORY 'E': PROBLEMS WITH SYSTEMS CRITICAL TO ETOPS.