As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE LT ENGINE WILL NOT START. NO N1 ROTATION DURING START SEQUENCE. TROUBLESHOT SYSTEM AND FOUND DEFECTIVE START/GEN AND DRIVE SPLINE. R & R START/GEN WITH TSO: 0.0 UNIT AND INSTALLED "NEW" DRIVE SPLINE. REMOVED START/GEN: SN 96011 PREVIOUSLY REPLACED ON FEB 8, 2011 AS A TSO: 0.0 HRS PRIOR TO BRUSH FAILURE.