As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATED ON TAKEOFF ROLL. RAN QRH & LIGHT EXTINGUISHED. NO FURTHER ACTION REQUIRED. ACFT GROUNDED. CHECKED ACAUS FOR FAULTS. NO FAULT CODES NOTED. ACCOMPLISHED PRECAUTIONARY REPLACEMENT OF RT TRIM AIR CHECK VALVE IAW AMM 21-61-09.