As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 HYD ISO VLV CAUTION DURING CLIMB. RAN E&A CHECKLIST. DIVERT TO PDX. BRAKES WORKED ON LANDING. LANDING UNEVENTFUL. REMOVED FROM SERVICE. REPLACED #1 HYD ISO VLV OUTPUT PRESSURE SWITCH IAW AMM TASKS 29-30-11-000-801 AND 29-30-11-400-801 FOR PRECAUTIONARY MEASURES. REF FIM TASK 29-10-00-810-801. LEAK CHECKS GOOD. TESTS GOOD. AIRCRAFT RETURNED TO SERVICE.