As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION TO HNL. DURING FLIGHT LEFT BLEED FLUCTUATES FROM 8-67. WITH NO POWER CHANGES FLUCTUATIONS HAPPENING DURING ALL PHASES OF FLIGHT. REMOVED AND REPLACED ENG #1 PRESSURE REGULATOR PILOT VALVE REF AMM 36-12-03. OPS CHECK GOOD. OK FOR SVC