As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE BLEED LIGHT CAME ON AT TOP OF DESCENT, WITH EICAS BLEED MSG. [07-10-07] CREW SHUT OFF ENG BLEED AIR & ACCOMPLISHED AIR SUPPLY MODULE BITE TEST. RESET & CHECKED OK. FOLLOWUP TROUBLE SHOOTING FOUND NR 1 ENG ELBOW FTTG LOOSE AT HPSOV. RESECURED ELBOW & VALVE/ SYSTEM CHKS OK. SUSPECT VIBRATION & THERMAL CHANGE CAUSED ELBOW CLAMP TO LOOSEN.