What was found
LEFT PACK LIGHT ILLUMINATED. ACFT GROUNDED. AFTER 3 RESETS, ZONE TEMP CONTROLLER NR 1 SHOWS PACK TEMP CONTROL VALVE IAW FIM 21-61 TASK 801. REPLACED THE LEFT PACK TEMP CONTROL VALVE IAW AMM TASK 21-51-10-000-801, & 21-51-10-400-801. ACCOMPLISHED BITE- PASSED. OPERATED PACK FOR APPROX 5 MINUTES. PACK LIGHT ILLUMINATED. BITE CHECK SHOWS TCV FAIL. PERFORMED BITE CHECK WITH NO FAULTS NOTED IAW FIM 21-61 TASK 801. OPERATED PACK. ACM DID NOT SPOOL UP AND PACK ONLY CREATED HOT AIR. SUSPECT ACM FAILURE. REMOVED AND REPLACED THE LT ACM IAW AMM 21-51-04-401-002. OPS CHECKED GOOD. RAN THE LT PACK ON HOT AND COLD CYCLES FOR 5 MINUTES EACH, NO DEFECTS NOTED. FOUND REMOVED ACM SHAFT WOULD NOT SPIN. LEAK CHECKED GOOD.