As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON SHORT FINAL HAD NR 2 FIRE WARNING BOTH LOOPS, SHUTDOWN PER POM. DID NOT FIRE BOTTLE, NO SECONDARY INDICATIONS. FOUND HP BLEED VALVE DUCT SHROUD BROKEN. SUSPECT WHEN THROTTLES PULLED BACK FOR DESCENT, BLEED VALVE OPENS AND DUMPS HOT AIR UNDER CORE COWLS. REPLACED DUCT AND VALVE, OPERATION NORMAL.