Air Accidents Investigation Branch
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G-BBLH, a Piper J3C-65 Cub, was being taxied behind M-SFPL, a Bombardier Global 6000 (G6000) that was parked on an adjacent apron with engines running. G-BBLH was caught in the G6000s jet efflux and aggressively spun round resulting in damage to the Cubs left wingtip. The G6000 had not been positioned in accordance with apron ground markings that had been aligned to direct engine efflux from parked aircraft away from Taxiway L, which ran south of the apron.
The maintenance organisation responsible for movements on the apron undertook safety action to remind their operations team of the requirement to align aircraft with the apron ground markings prior to engine start.