As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - PUSHBACK FOR FLIGHT 2473, LEFT ENGINE WILL NOT START. ENGINE START STATUS MESSAGE APPEARS BUT THERE IS NO N2 ROTATION. RETURNED TO THE GATE. REPLACED NR 1 STARTER IAW IAM 80-11-01 PGS 401-406, LEAK AND OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.