As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO-PHL - EL - INFLIGHT LOSS OF GREEN HYDRAULIC PRESSURE. GREEN ENGINE PUMP WAS TURNED OFF WITHIN 30 SECONDS. FOUND LEFT ENGINE HYD PRESSURE SWITCH AT FAULT. REPLACED LEFT ENGINE HYDRAULIC PRESSURE SWITCH PER AMM 29-11-17-400-041. SERVICED HYDRAULIC QUANTITY AS NEEDED, ENGINE RUN-UP AND CHECKED NORMAL.