As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR DOOR OPEN LIGHT ON AT FL330, STAYED ON WITH CLB TO FL350. LIGHT STAYED ON APPROX 20 MINUTES THEN WENT OUT. STAYED OUT REMAINDER OF FLT. REPLACED RIGHT MLG DOOR PROX SWITCH AND ADJUSTED PER M/M 32-60-05. GEAR DOOR INDICATION NOW TESTS NORMAL.