As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R PACK TEMP EICAS AFTER LEVEL OFF AT FL 410. EIACAS MSG WENT OUT AFTER STBY N SELECTED.(<P>REMOVED AND REPLACED R PACK TEMP CONTROL VALVE IAW AMM 21-51-12, OPS TEST OK. ALSO CHANGED K50 RELAY IAW SWPM 20-81-11 PER FIM 21-51 FT 803, OPS CHECK OK.<BR /></P>)