As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - FLIGHT 2446 - WHEN SELECTING FLAPS FROM 15 TO 35, RECEIVED A FLAP POWER CAUTION MESSAGE. COMPLIED WITH THE EMERGENCY/ABNORMAL CHECKLIST, NO HELP. AIRCRAFT LANDED WITH FLAPS 15. AFTER LANDING FLAPS WOULD NOT RETRACT. MAINTENANCE CLEARED THE CAUTION BY SERVICE LETTER DH8-400-SL-27-002A. CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.