What was found
RT ENGINE FIRE WARNING CAME ON DURING CLIMB OUT THROUGH 18,000. FOLLOWING QRC REDUCED POWER ON RT & LIGHT WENT OUT. NO OTHER INDS. RESUMED NORMAL POWER & RETURNED TO AIRPORT. INSPECTED RH ENGINE, FOUND FIRE DETECTION LOOP IMPINGING HARD AGAINST A METAL CLAMP. FIRE LOOP HAD CHAFING DAMAGE FROM CONTACT WITH CLAMP. R & R FIRE DETECTION LOOP REF AMM 26-11-01. FOUND BOTH BLEED AIR DUCTING WIGGINS CLAMP SEALS ON THE RH ENGINE MELTED AND LARGE BLEED AIR LEAKS AT THE WIGGINS COUPLINGS. R & R BOTH WIGGINS COUPLING SEALS REF AMM 36-11-00. PERFORMED ENGINE RUNS AND VERIFIED NO LEAKS OF THE BLEED AIR DUCTS AND NO FIRE INDICATIONS ON THE RH ENG..