As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE LOG PAGE 60106775 RIGHT PACK LIGHT ILLUMINATED IN FLIGHT. GROUNDED - YES. REMOVED AND REPLACED RT FLOW CONTROL VALVE REF B737-900 AMM 21-51-01. REMOVED AND REINSTALLED ACM REF 21-51-04 AND MIX MUFF REF AMM 21-51-17 FOR ACCESS TO FLOW CONTROL VALVE. PERFORMED PZTC BITE REF AMM 21-61-00-700-806-002, OP CHECK GOOD. PERFORMED LEAK CHECK AT ALL DISPLACED DUCTING AND SENSE LINES, NO LEAKS NOTED. ETOPS GROUND VERIFICATION SUCCESSFUL.