As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE WOULD NOT START. ACFT GROUNDED. NO IGNITOR WAS HEARD DURING TEST REF AMM 74-00-00-750-801-F00. R & R NR 1 ENGINE LT AND RT INGITOR BOXES, DURING OPS TEST RT IGNITOR FAILED CHANNEL B TEST. R & R NR 1 ENGINE ELECTRONIC ENGINE CONTROL REF AMM 73-21-60. ALL OPS CHECKS NORMAL REF AMM 73-21-60. ACFT RETURN TO SERVICE.