As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE RT ENGINE MANIFOLD PRESSURE GAUGE WENT TO 30" AND WOULD NOT MOVE EVEN WITH FULL POWER. MAINTENANCE FOUND THE MP LINE AT THE ENGINE WAS BROKEN APPROX 3 INCHES FROM THE CYLINDER. THE LINE WAS REPAIRED AND ENGINE RUN CARRIED OUT WITH NO FURTHER ISSUES.