As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL & DURING DESENT L ENG BLEED OFF EICAS MESSAGE AND OFF LT ON LEFT BLEED SWITCH WOULD COME ON AND THEN GO OUT WHEN POWER CAME BACK UP OR PACK TURNED OFF.(<P>PERFORMED ENGINE RUNS IAW MM 71-00-20 OPS CK GOOD NO DEFECTS NOTED PERFORMED AIR SUPPLY BITE MODULE TEST IAW 767 AMM 36-11-00, OPS GOOD NO DEFECT FOUND AT THIS TIME.<BR /></P>)