As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION MASTER WARNING CAME ON WITH MSG NOSE DOOR OPEN GEAR DISAGREE WITH GEAR HANDLE UP NOSE GEAR INDICATING DN GREEN. LT & RT MLG INDICATING WHITE & UP ACCOMPLISHED EP 12-2 & EP 12-8 GEAR INDICATIONS NORMAL WITH HANDLE DOWN. COMPLIED WITH TROUBLESHOOTING 001565. R & R NLG HARNESS. REPLACED PROC SENSOR BRACKET & ADJUSTED NOSE GEAR TOW BAR COLLAR REFERENCE NON-ROUTINE CONTINUATION CARDS FOR DETAILS.