As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF OUT OF SYR RIGHT ENGINE MANIFOLD PRESSURE DROPPED. AIRCRAFT THEN RETURNED TO SYR WITHOUT ANY PROBLEMS. MAINTENANCE FOUND NR 5 CYLINDER INTAKE PIPE HOLD DOWN BOLT PULLED THE THREADS OUT OF CYLINDER. MAINTENANCE HELICOILED CYLINDER, OPS CHECKED GOOD.