As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WOULD NOT START. INSPECTED, FOUND FUEL COKING AT INJECTION MANIFOLD ASSY, SN 1971B, TSO: 238.5. INSTALLED SAME TYPE INJECTION MANIFOLD ASSY. SN 2685B TSO: COMPLIED WITH GROUND RUN AND LEAK CHECKED ONE, FOUND TO BE GOOD. ALL WORK DONE IAW MM IAW MFG MM. (K)