As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER A NORMAL TAKEOFF, THE PILOT WAS UNABLE TO MAINTAIN CLIMB POWER AND TORQUE ON THE LT ENGINE. AS POWER CONTINUED TO DECREASE, THE PILOT SHUT DOWN THE LT ENGINE AND RETURNED TO DEPARTURE FOR AN UNEVENTFUL LANDING. INSPECTION REVEALED THAT THE PRIMARY FUEL LINE FROM THE FUEL CONTROL UNIT WAS LEAKING BECAUSE THE STARTER GENERATOR COOLING DUCT HAD CHAFED A HOLE IN THE LINE.