Shortly after levelling off at FL70, the commander, who was flying the aircraft manually, reported two occurrences of an uncommanded input into the aileron controls that caused the aircraft to roll first to the left and then to the right. During the subsequent descent and return to Bournemouth the fluorescent flood lights in the cockpit were seen to flicker. After the aircraft was parked on the stand, the lower hatch was opened and smoke was seen to come from the bay. An investigation carried out by the operator and tests on a number of components did not identify any faults that would have caused any of these reported symptoms.
BAE ATP, G-BTPF