What was found
FLT 1913 MCO-CUN, AIR RETURN BACK TO MCO. UPON TAKEOFF, WHILE CLIMBING THROUGH 800 FEET A STRONG ELECTRICAL SMELL BEGAN COMING OUT OF CA VENT. STRONG FUMES; PERFORMED INSPECTION IAW FIM 21-20-00. NO FAULT FOUND. INSPECTED BORESCOPE PLUGS ON NR 1 ENGINE REF TASK CARD AMM 72-00-00-200-803B. FOUND NO EXCESS ANTI-SEIZE. PERFORMED ENGINE PNEUMATIC BLEED SYSTEM OPS TEST PER AMM 36-11-00 FOR BOTH ENGINES. NO ABNORMAL SMELLS OR DEFECTS NOTED.