As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT WHEN RECALL WAS DEPRESSED THE LEFT PACK LIGHT ILLUMINATED. LIGHT EXTINGUISHED WHEN MASTER CAUTION LIGHT WAS RESET. GROUNDED - YES. CURRENTLY SYSTEM CHECKS GOOD AND THERE WERE NO LIGHTS AFTER HITTING RECALL. BUT THERE IS HISTORY SO REMOVED AND REPLACED TRIM MODULATING VALVE IAW B737-900 AMM 21-61-21-000-801 AND B737-900 AMM 21-61-21-400-801. ETOPS GROUND FUNCTIONAL CHECK GOOD IAW B737-900 AMM 21-61-00-700-806-002.