As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IMMEDIATELY AFTER ROTATION, FIRE BELL ACTIVATED AND FIRE WARN LIGHTS ILLUMINATED. COULD NOT CANCEL BELL. FINALLY PULLED "FIRE BELL" CIRCUIT BREAKER. RAN FIRE TEST ON ENGINES AND MAIN CARGO COMPARTMENT. TESTED OK. REMOVED AND REPLACED ENGINE FIRE PROTECTION CONTROL UNIT IAW B727 26-11-000-4. OPS CHECKS NORMAL AT THIS TIME. A/C OK FOR CONT SERVICE. REMOVAL/INSTALLATION OFF MFG 65-60209-16, POS ONL SRL D00032 TAG B25254.