What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS 1 HOUR INTO FLIGHT, AT CRUZ FL340, SMELLED STRONG FUMES IN FLT DECK AND CABIN, SMELLED LIKE ELECTRICAL FIRE. MAINTENANCE FOUND RECIRC FAN 15HG TO BE SOURCE OF SMELL. REMOVED AND REPLACED 15HG IAW AMM 21-21-51. OPS NORMAL. RAN FANS AND PACKS, NO REMAINING ODOR DETECTED.