As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:NAEMERGENCY DECLARED - ON APPROACH WHEN SELECTING 15/15 ON FLAP HANDLE FROM 15/0 TO EXTEND THE FLAPS THE SPFI REMAINED AT 15/0. CYCLED HANDLE W NO CHANGE WORKING CHECKLIST AND SELECTED 15/20 THE FLAPS SLOWING EXTENDED TO 20 DEG ON SPFI BUT THEN SPFI ROLLED FLAPSREMOVED & REPLACED INSTRUMENTATION POSITION PICK - OFF UNIT (3CN) PER MM 27 55 12 0401 OPS CKS NORMAL EFF SOURCE REF 27 52 32 01