As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LT ILLUMINATES ON RECALL AND RESETS WHEN M/C RESET. GROUNDED - YES. #2 PZTC SHOWS FLT DECK TRIM VALVE FAULT IN FFR. RESET FAULT. FAULT DID NOT RETURN AFTER SEVERAL VERIFY TESTS. GVI ON TRIM VALVE OPS IS SMOOTH & SOUNDS NORMAL. BITE TEST #2 PZTC GOOD. REF B737-900 FIM 21-62/T832. FUNCT CHECK SAME TRIM VALVE WITH PACK OPERATION GOOD.