What was found
CABIN TEMP CONTROL, ONE OF THE LT PCU CHANNELS HAS FAILED. DB 42 GPM_GENERAL OPS (RIGHT 4) DB 42 GPM_GENERAL OPS (LEFT 1) REF L/P 8930547 FOR CORRECTIVE ACTION CABIN TEMP CONTROL L STATUS MESSAGE PERFORMED FIM TASK DMC-B787-A-21-60-F1-65A-421A-A FOR CABIN TEMP CONTROL L STAUS MESSAGE WITH GROUND TEST FAILING FOR MM 45-16521. PERFORMED FIM TASK DMC-B787-A-45-10-F1-23A-421A-A WITH ALL GROUND TESTS PASSING BUT STATUS MESSAGE STILL UNABLE TO REMOVED AND REPLACED PCU LT IAW DMC-B787-A-21-51-20-00D-720A-A AND DMC-B787-21-51-20-00D-520A-A WITH STATUS MESSAGE CLEARING. COMPLETED DMC TASK DMC-B787-A-21-51-20-00D-720A-A FROM STEP C.11 TO COMPLETION. OPS CHECK PASSED NO MSG NOTED.