Wiring defect caused ATR flight instrument loss

On May 18, 2024 the UK Air Accidents Investigation Branch (AAIB) published a report into a January 17, 2023 incident involving a West Atlantic ATR 72 approaching East Midlands Airport.

The aircraft involved was ATR 72-202F, G-NPTF (c/n 192), which suffered a significant electrical malfunction during the latter stages of a Category II (CAT II) automatic approach to the airport. The malfunction caused the loss of the co-pilot’s flight instrument displays and triggered a number of warnings and cautions. The flight crew executed a go-around and diverted to Birmingham International Airport.

The AAIB said: “A wiring defect, probably caused by incorrect use of mechanical wire stripping tools at a third-party organisation, was the cause of the electrical malfunction.”

It added: “Safety action has been proposed by the equipment manufacturer and has been taken by the third-party maintenance organisation to promote the use of alternative tooling to prevent a reoccurrence.”

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