As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 330 BELLY DOOR OPEN LIGHT ILLUMINATED PERFORMED ABNORMAL PROCEDURE. PRESSURIZATION NORMAL. CONTINUED NORMAL OPERATIONS. FOUND A PIT CARGO DOOR SWITCH BROKEN. REMOVED AND REPLACED SWITCH, OP CHECKS GOOD PER DC8 M/M 52-70-0 AND WDM 52-3-0.