As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT A/C PACK ON /OFF DISCRETE SHOWS ON WITH PACK SWITCH OFF. ACFT GROUNDED. REMOVED RT PACK FLOW CONTROL VALVE. REMOVED ACM REINSTALL NEW FLOW CONTROL AND REINSTALL ACM REF AMM 21-51-01 AND AMM 21-51-04. PERFORMED FLOW CONTROL VALVE INSTALLATION TEST AND ACM INSTALLATION TEST REF AMM 21-51-01 AND ACM TEST AMM 21-51-04 AND PERFORMED LEAK TEST AND BITE TEST REF AMM 21-61-00. ACC TEST ARE GOOD AND BITE TEST OK. NO LEAK NOTED.