As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE FAILED TO START ON LEFT IGNITION. GROUNDED - YES. PERFORMED #2 ENG L/H EXCITER REMOVAL AND INSTALLATION PER PHX TROUBLE SHOOTING. AUDIBLE TST OPS CHECK PASSED BUT ENG START FAILED. SWAPPED L/H AND R/H IGNITION LEADS FOR TROUBLE SHOOTING. FOUND L/H IGNITION LEAD BAD. REMOVED AND REPLACED #2 ENG L/H IGNITION LEAD. BOTH AUDIBLE AND ENG START OPS CHECK GOOD. REF'S B737-900 AMM 74-11-01 (EXCITER) AMM M74-21-01 (IGNITION LEAD).