As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT APPROXIMATELY 5000 FT WHEN CONFIGURED FOR LANDING, LEFT FLAP STAYED AT 5 AND RT FLAP WENT TO 20. RAN EMERGENCY NON NORMAL CHECKLIST AND LANDED WITH FLAPS 20. EMERGENCY DECLARED. FLAPS CHECKS IAW FIM 27-58-00-815-803. R & R INDICATOR FLAP POSITION IAW AMM 2K7-58-02-401. OPS CHECK OK. IPC REF 27-58-02-03A ITEM 005.