A Blue Islands Avions de Transport Regional ATR-72-212A, registration G-ISLM performing flight SI-208 from Guernsey,CI to Jersey,CI (UK), was accelerating for takeoff through about 90 knots over ground when the transponder ceased transmitting. The aircraft continued takeoff and returned to Guernsey for a safe landing.
The aircraft is still on the ground 7 days later.
The British AAIB reported the aircraft lost most of the electrical circuits and all major instruments after takeoff. Using the standby instruments the aircraft returned to Guernsey. The occurrence was rated a serious incident and is being investigated.
In a brief interim report on Jan 9th 2026 the AAIB reported: "Examination of the electrical system components has identified the Starter/Generator fitted to the right engine as the source of the overvoltage which affected the aircraft, but the reason this overvoltage was not isolated by the safety systems fitted to the aircraft remains unclear."
