As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - FLIGHT CONTROL, CREW REPORTED THAT THE FLAPS SPLIT TWICE AT 5 DEGREES AND 30 DEGREES. BOTH TIMES MOVED LEVER TO UP 1 AND RESUMED PREVIOUS FLAP SETTINGS. MAINTENANCE REMOVED AND REPLACED THE FLAP POSITION INDICATOR IAW BOEING 737-300 MM 27-58-41-4. OPERATIONAL CHECKS WERE NORMAL.