As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTING FROM ANGUILLA ISLAND AND DURING THE CLIMBING STAGE THE ENGINE SURGED APPROXIMATELY 40-50 PERCENT TORQUE. ENGINE WAS SHUT DOWN AND AIRCRAFT DIVERTED AND LANDED IN ST MARTEEN ISLAND. FURTHER INVESTIGATION REVEALED THAT THE ENGINE TOWER SHAFT WAS SHEARED CAUSING THE ENGINE SURGE. ENGINE WAS REMOVED AND REPLACED. (M)