As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#1 ENG NO LIGHT OFF WITH RIGHT IGNITION. SUCCESSFULLY STARTED WITH LEFT IGNITION. GROUNDED - YES. REMOVED AND REPLACED IGNITER PLUG, HARNESS AND EXCITER BOX REF B737-900 AMM 74-11-01/401, 74-21-01/401 AND 74-21-02/401. AUDIBLE TEST CHECK PASSED REF AMM 74-00-00-750-801-F00.