Disagree to the disagree. I'm not sure how Airbus does it , but I do know how McDonell Douglas did it. The "pilot aid" was the person responsbile for checking for any bits and pieces being left behind in the manufacturing process. At McDonnell Douglas the pilot aid was a very experienced A&P with over 30 years of seniority and a long time in the position. The pilot aid released the aircraft to the Production Test Pilots who did the initial ground runs and flight checks. At no time were the Production Test Pilots required to inspect the avionics bay/E&E compartment. When the Production testing was completed the aircraft would go for an acceptance flight by the receiving airline. All receiving airlines follow their own procedures for that and essentially it is a shortened version of the production test flight.
So I would place the blame on the Airbus team for their oversight, not any EK people.
Typhoonpilot