Dornier 328-300Atlantic Coast Airlines
Albany, NY, USA · 2002-05-22·N421FJ
What happened
NTSB summary, verbatimThe Dornier 328-300 experienced uncommanded rudder oscillations on descent. At the start of the oscillations, the autopilot was engaged. However, it was disengaged and the oscillations continued. The integrated avionics computer (IAC) was replaced, and the airplane was given a maintenance test flight. No problems were noted and the airplane was returned to service. Examination of the IAC found no direct link between the rudder oscillations and the IAC. Seven months after the event, it has not reoccurred. The cause of the oscillations was not determined.
Photographs
1the aircraft, and what the investigators foundProbable cause
the Board's determinationRudder oscillations of an undetermined origin.
Sequence of events
1 timed eventsfrom the FDR factual report · claude-sonnet-5- about 0900 eastern daylight timedescentp.1Aircraft experienced uncommanded yawing while on descent to land at Albany International Airport
NTSB analysis
from the final reportThe Dornier 328-300 experienced uncommanded rudder oscillations on descent. At the start of the oscillations, the autopilot was engaged. However, it was disengaged and the oscillations continued. The integrated avionics computer (IAC) was replaced, and the airplane was given a maintenance test flight. No problems were noted and the airplane was returned to service. Examination of the IAC found no direct link between the rudder oscillations and the IAC. Seven months after the event, it has not reoccurred. The cause of the oscillations was not determined.