As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN CRUISE FLIGHT FROM KBCT TO KBVT AT FL410 THE FLIGHT HEARD A LOUD BANG FOLLOWED BY OSCILLATIONS ON THE ROLL AXIS. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT WAS LANDED AT KLACY WITH NO FURTHER PROBLEMS. REPLACED RT ENGINE BLEED ACTUATOR VALVE PER PWC JT15D-5 MM 72-30-00. OPS CHECK GOOD. TEST FLIGHT WAS SATISFACTORY.