As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 ENGINE VALVE CLOSED LIGHT ILLUMINATED BRIGHT BLUE ON CLIMBOUT ALL ENG INDICATIONS NORMAL. LIGHT REMAINED ON FOR 2 HRS THEN WENT OUT. ENGINE VALVE LIGHT RETURNED 30 MIN LATER AND REMAINED ON. ACFT GROUNDED. REPLACED HPSOV SWITCH IAW AMM 73-21-09-000/400-801-F00. OPS NORMAL.