What was found
CLIMBING THROUGH16,500 FT MSL, LT BLEED AIR LIGHT FLASHED THEN STEADY. FOLLOWED EMERGENCY PROCEDURE AND LANDED. DURING DESCENT, BLEED AIR FAIL LIGHT EXTINGUISHED. INVESTIGATION REVEALED THAT THE BLEED AIR SENSING LINE HAD A MELTED PLACE, WHICH CAUSED THE BLEED AIR LIGHT TO COME ON. SENSING LINE WAS REPLACED, AND SYSTEM OPERATIONAL CHECK. AIRCRAFT RETURNED TO SERVICE. (M)