As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEMP OUTPUT OF LT PACK CYCLES BETWEEN 10-20C IN STABLE CRUISE. RT PACK BETTER AT 15-13C. 20 SEC CYCLE LATER AT FL 380 RT STEADY AT 24C. LEFT VARIES 20-28C. ACFT GROUNDED. PEFORMED BITE CHECK, GOOD IAW AMM 21-51-00. RAN BOTH PACKS FOR 30 MINUTES, NO FAULT NOTED. OPS TEST NORMAL REF AMM 21-61-00.