As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE. RTFL. VERIFIED BOTH OUTFLOW VALVES OPERATE IN MANUAL MODE. AFT VALVE AUTO FUNCTION INOP. CHECKED MAT, NO FAULT MSGS. TESTED LT AND RT PRESS CONTROLLERS, BOTH TESTS PASSED. NO STATUS MESSAGES. SYSTEM CHECKS NORMAL.