As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TROUBLESHOT APU FAULT REGARDING SLOW STARTS. STARTER IDENTIFIED TO HAVE A TWISTED SPLINE AS PART OF OTHER INSPECTIONS. GENERAL CHECK OF APU, CONDUCTED ENGINE RUN WITH ACCESS PANEL REMOVED. DURING THE RUN A FINE MIST OF FUEL NOTED FROM FUEL MANIFOLD. FUEL MANIFOLD FOUND TO CHAFED ON IGNITER. OPEN