As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTING #1 ENGINE WITH HUFFER CART AND IGN SWITCH ON R WE GOT 2 HUNG STARTS WITH APPARENT LITE OFF. CONTACTED MAINTENANCE CONTROL AND TRIED TO START #1 ENGINE ON L IGN AND IT STARTED NORMALLY. GROUNDED - YES. REMOVED AND REPLACED #1 ENG RH IGNITION EXCITER I.A.W. B737-900 AMM 74-11-01. REMOVED AND REPLACED #1 ENG RH IGNITER PLUG I.A.W. AMM 74-21-02.