What was found
ON TOP OF CLIMB, A BURNING ODOR & SMOKE APPEARED IN COCKPIT, REPEATEDLY PERFORMED APPROPRIATE CHECKLIST; PERFORMED FUEL DUMPING PER ABNORMAL CHECKLIST; PULLED CUR. C/B PER EMERGENCY CHECKLIST. SMOKE SOURCE IDENTIFIED AT LOW BLOW FAN RESISTOR "COCKPIT CLIMATE CONTROL"; REMOVED & WIRING STOWED HI-BLOW; OPS NORMAL IAW TECH AIR MM ON STC NR ST145CH, SEE 4-M LOW BLOW; INSPECTED FUEL DUMP SYSTEM AND DUMP CHUTES AND RETRACTED AND SAFETY IAW MM 28-38-00; RESET C/B SYS, OPS NORMAL IAW MM 23-70-0; ENTERED ON DMI NR 19078 AS PER MEL 21-61-C CAT C . R & R CLIMATE CONTROL LOW SENSOR; SYS GROUND TEST NORMAL IAW MM STC ST14SCH. THIS CLEAR DMI 19078.