As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI BULK CARGO DOOR INDICATION UPON STARTING #2 ENGINE . AC RETURNED TO THE GATE AND MAINTENANCE GROUNDED AC. OPENED AND CLOSED BULK CARGO DOOR MULTIPLE TIMES TO VERIFY OPERATION IAW B767 AMM 52-36-01 OPS CHECK GOOD DOOR INDICATING CLOSED IN COCKPIT. RETURNED AC TO SERVICE .AND DEPARTED