As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AT 300 FEET NR 1 INU FAILED, NR 3 INU WAS ON MEL 34-27-2A. DUMPED 50,000 POUNDS OF FUEL AND RETURNED TO FIELD FOR A SAFE LANDING. REPLACED NR 1 INU IAW MM 34-41-03 PG 401 AND TESTED IAW MM 34-41-04 PG 501. AIRCRAFT RELEASED FOR SERVICE.