As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED AIR CYCLE MACHINE (ACM) HEAT EXCHANGER THAT UNDERWENT A MAJOR REPAIR DUE TO BOTH HEAT EXCHANGERS BEING DAMAGED. HEAT EXCHANGER UNIT WAS REPAIRED UNDER THE FOLLOWING REFERENCES: AQRD RS-890517 REV C DATED 06/14/2020, AQRD RS-890517-1 REV C DATED 06/14/2020, AQRD EWO-2700 REV IR DATED 12/15/2021, AND FAA 8110-3 DATED 6/15/2020 SIGNED BY DERT-710086-SW.