I recall one Tri* surging the centre engine at the then still MPA in 1986. To add insult to injury the flight was to return to UK families of those who had died in the battle for the FI, and had been visiting graves. BA engineer claimed engine was seized, until someone persuaded him to rotate the compressor blades rather than one of the static bits at the front. It was decided to ground run the engine that night and OC Eng would do it. Aircraft lined up on the pan and opened up to full chat. Debris and stuff everywhere - duty supplier claimed the Argies were attacking and there were shell holes in the Supply Sqn building, and at least one electrical transformer pillar was blown over. PSA quietly repaired the holes and other damage and there was never any inquiry.