As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT OSCILATING AROUND VERT AXIS DURING FLT, BEGAN DURING ACCELERATION ACCOMPANIED BY LOUD NOISE (WIND). FOUND RIGHT I/B FLAP ACTUATOR BROKEN. REMOVED AND REPLACED FLAP ACTUATOR PER DC-8 M/M 27-51-10. LEAK CHECK AND OPS CHECK OK PER M/M 27-51-10.