As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. RIGHT PACK LIGHT TURNS OFF WITH MASTER CAUTION RESET. GROUNDED - YES. WHILE ON MEL, CLIMBING THROUGH FL280 RIGHT PACK LIGHT ILLUMINATED. RESET SEVERAL TIMES - LIGHT RE-ILLUMINATED. CONTINUED SINGLE PACK. QRH. REPLACED THE RT RAM AIR INLET ACTUATOR PER AMM 21-51-21-400-801. RAM AIR ACTUATOR TEST IS GOOD.