As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TUS CREW REPORTED FLAPS WOULD NOT EXTEND BEYOND 23 DEGREES ON APPROACH. EMERGENCY DECLARED FLIGHT LANDED TUS WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. FOUND SEQUENCE MECHANISM SPRING BROKEN. REPLACED SPRING & FLAP CONTROL VLV. SYS GND CHECKED NORMAL, OPERATION CLOSED.