As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE WILL NOT START. NO FUEL FLOW. ACFT GROUNDED. PERFORMED NR 1 ENG SPAR VALVE SHAFT TEST IAW AMM 28-22-00 STEP E. EEC BITE CHECK IAW FIM 73-00 TASK 801 AND ENGINE VALVE CLOSED LIGHT FIM 80-06 TASK 801 AND 73-06 TASK 815. FUEL FLOW CHECKED OK. DISCRETE CHECKED OK. RESISTANCE VALVE AND VOLTAGE ALL CHECK NORMAL. REMOVED AND REPLACED NR 1 ENGINE HMU IAW T/C'S N8473000 & N8473001. LEAK CHECKED GOOD. OPS NORMAL.