As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ABIN DOOR OPEN CAS AT FL260. ONCE CAS ILLUMINATED WE HEARD THE DOOR OPEN INDICATOR UNLOCK. CONDUCTED QRH AND LANDED WITHOUT INCIDENT. REMOVED CABIN DOOR THRESHOLD WIRE HARNESS P/N 8469153-1 AND INSTALLED NEW HARNESS P/N 8469153-1 WORK DONE IN REF. TO 680A AMM CH 52-10-50, 52-10-04 AND SPM CH 20-30-00. RESET DOOR OPERATION AS NECESSARY. OPS CHECKED GOOD.