As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BLIND ALTITUDE ENCODER HAD BEEN DISCONNECTED FROM STATIC SYSTEM AND WAS SAMPLING CABIN AIR RATHER THAN THAT WHICH THE ALTIMETER WAS SENSING. RECONNECTED WITH APPROVED HARDWARE, LEAK TESTED STATIC SYSTEM, AND PERFORMED TEST PER FAR 43 APPENDICES E AND F. CERTIFIED AIRCRAFT TO BE IN C/W FAR 91.411 AND 91.413.