As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE BLEED AIR 3 OFF LEVEL 1 MESSAGE CAME IN VIEW (NR 2 BLEED ALREADY DEFERRED). DECISION WAS MADE TO DIVERT TO SKBO FOR MX ASSISTANCE. FUEL DUMPED APPROX 27K TO ACHIEVE ACCEPTABLE LANDING WEIGHT. LANDING ACCOMPLISHED NORMAL. MX T/S FOUND SENSE LINE LOOSE, TIGHTENED LINE. CLEANED PNEU MANIFIOLD TEMP SENSOR, IAW 36-13-03. RTS PAC1 AND PSC2 IAW AMM 36-10-02. OP'S CHECK GOOD. A/C RELEASED FOR SERVICE.