As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING PAST FL250 SLIDE ARM WARNING LT AND BUZZER CAME ON. NO DOOR WARNING INDICATIONS, NO PRESSURIZATION PROBLEMS AT CRUISE DP 8.2 ON DESCENT PASSING FL 265 P 7.0 LIGHT AND BUZZER WENT OUT. DEFERRED PER MEL 52-11-01-23 M806500 ASSIGNEDPERFORMED TEST OF DOOR WARNING SYSTEM PER TSM 52-73-00 AND GMM 52-73-00 FIG 501. OPS CHECK GOOD.