As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AS PER MEL 21-32B- WE TRIED TO RESET THE SYSTEM AND THE PACK LIGHT REMAINED ON. GROUNDED - YES. REPLACED R/H ACM PER B737-900 AMM 21-51-04 AND EA 900ER-2EA-21116. ACCOMPLISHED ICE PROTECTION SYSTEM INSP PER AMM 21-51-04-400-802-002 STEP G. 3 AND 5. NO DEFECTS. INSTALLATION TEST PASSED.