As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER THE NR 2 ENGINE START, CONTROL LIGHT CAME ON. ACFT GROUNDED. REMOVED AND REPLACED THE WIRE HARNESS IAW AMM 73-21-06-00-801-F00, AND 73-21-06-400-801-F00 3. A-F [1][A] [B]. REMOVED HMU IAW T/C N8473000. INSTALLED SERVICEABLE HMU, OPS AND LEAK CHECKED GOOD.