What was found
RECEIVED A FIRE LIGHT ON ENGINE 3 AT T/O 3 MIN. CLIMBING THRU 12,000 FT ENGINE WAS SECURED WITH CHECKLIST, FIRE BOTTLE BLOWN. REMOVED AND REPLACED RT NR 2 FIRE EXTINGUISHER BOTTLE UP TO AND INCLUDING STEP 3 G (1)G REF AMM 32-21-01-4. MANIFOLD DISCHARGE PORTS PLUGGED AND FLAGGED FOR PRESSURE/LEAK CHECKS. FOUND NR 3 ENGINE WIRING HARNESS VC4966P WITH HEAT DAMAGE. DUE TO NR 3 ENG R&R, SEE REF WRI 72-00/8408 FOR NR 3 ENG WORK COMPLETION.