As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TEMP CONTROL NO. 1 TECH SERVICES: FAULTING FLOW SELECTOR 5HB ACCOMPLISH TSM 21-51-00-810-801-A FLOW SELECTION FAULT. PART HAS BEEN ORDERED IF NEEDED GROUNDED - YES. PER TSM 21-51-00-810-801-A PERFORMED OPS TEST OF THE PACK TEMP-CONTROL SYSTEM. TEST PASSED. NO FAULTS. CLEARS MEL 21-21-00-04. MDDR 77204 + PLACARD REMOVED.