As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER THE FOURTH FLIGHT OF THE DAY THE PILOT SHUT THE HELICOPTER DOWN. THE PILOT COULD NOT START THE ENGINE FOR ANOTHER FLIGHT. INSPECTED ENGINE ASSY AND THE GAS GENERATOR LOCKED UP DUE TO COKING FROM THE FUEL INJECTION MANIFLOD. REMOVE THE ENGINE ASSY AND ASSIST MFG SERVICE CENTER IN REPLACING THE FUEL INJECTION MANIFOLD. (K)