As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT 3483, PACK NR 2 HI TEMP LIGHT ILLUMINATED PACK NR 2 DUCT TEMP AT 100 DEGREES. GATE RETURN. MAINTENANCE REMOVED AND REPLACED 31 PAC COUPLING ALSO REMOVED AND REPLACED NR 2 PAC VALVE PN 3502B000-004 SN/OFF 1086 SN/ON 1069. IAW AVRO AMM 21-10-11-401. SEE MM 409 086167 FOR DETAILS ALL CHECKS GOOD.