As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT OF PHL, GEN 1 BTB, GB AND FIELD LIGHTS ILLUMINATED FOLLOWED ABNORMAL PROCEDURES DUMPED 22,000 LBS RETURNED TO AIRPORT ONE GENERATOR ALREADY ON DMI SWAPPED RN 1 AND NR 2 VOLTAGE REGULATOR. OPS CHECK GOOD PER MM 24-20. AIRCRAFT RETURNED TO SERVICE. (M)