An Air Canada Airbus A320-200, registration C-FFWN performing flight AC-416 from Toronto, ON to Montreal, QC (Canada) with 145 passengers and 5 crew, was on short final to Montreal’s runway 24R when the crew received an “AUTO BRK FAULT” ECAM message and decided to go around. The crew requested to enter hold clear of other traffic while working the related checklists, declared emergency about 20 minutes later and landed safely about 30 minutes after the go around.

The Canadian TSB reported pin F on the brake servo valve #1 connector 15GG-A was contaminated. The pin was replaced, operational tests were satisfactory thereafter.

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