What was found
ON APPROACH, THE NR 1 ENG FIRE WARNING LIGHT CAME ON. POWER WAS RETARDED TO IDLE & THE LIGHT WENT OUT, FOUND BLEED AIR SUPPLY TUBE CRACKED AT NAC HEAT CONNECTION, FOUND LEAK FROM WHERE THE LP BLEED AIR SUPPLY TUBE MEETS THE PRSOV VLV, & FOUND THE BLEED AIR SUPPLY TUBE IN THE LT PYLON LEAKING AROUND BOTH CONNECTIONS. REMOVED CRACKED LT BLEED AIR SUPPLY TUBE & INSTALLED SERVICEABLE TUBE ASSEMBLY PN ON & OFF 2655101-87, USING NEW GASKETS, PN 6050001-12 & 6600335-3 QTY 1 EA. REMOVED WORN C SEAL FROM LP TUBE ASSEMBLY AT THE PRSOV & INSTALLED NEW PN ON & OFF 612-A51-0038-2 QTY 1 EA. REMOVED WORN O RING SEALS FROM THE LT PYLON BLEED AIR SUPPLY TUBE WIGGINGS FITTINGS & INSTALLED NEW PN ON & OFF M83248 1-218 QTY 4 EA. ALL WORK DONE IAW AMM STANDARD PRACTICES. LEAK & OPS CHECKED OK. ACFT WAS RTS.