As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR WARNING LIGHT ILLUMINATED AT TOP OF CLIMB (FL260, CABIN ALT. 3800', ROC -0) 30 MINUTES LATER ON DESCENT UPON REACHING 10,000 FT, LIGHT WENT OUT (2500 CABIN ALT AP: 5.4, ROC 0). ADJUSTED AFT DOOR LOCK PROX SWITCH AND COMPLIED WITH DOOR TEST IAW EA500 AMM 52-00-00-071-011.