As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLEAN UP OF FLAPS. NR 1 PORT L/E FLAPS WOULD NOT RETRACT FROM 5 DEGREES TO 2 DEGREES POSITION. GSP U TRIED JUMPER PLUG NO HELP. ON FURTHER TROUBLESHOOTING FOUND WEAR MARKS WHERE SWITCH LINKAGE WAS CONTACTING AIRFRAME. NR1 L/E FLAP SWITCH IMPROPERLY INSTALLED. REINSTALLED NR 1 L/E FLAP SWITCH IAW MM 27-82-001-4. OPS CHECK NORMAL. ACFT OK FOR SERVICE.