I'm thinking the OP is referring to security sweeps of aircraft, after they arrive from an int'l flight, and before they depart again. Maybe his aircraft arrived the night before, and didn't get security clearance til morning.
I see that DL 16 LAX/ATL was delayed 43 minutes today, even though it came in on time.
edited to add . . . .
Originally Posted by
LegalTender
Delta found a plane that had arrived o'nite from South America but hadn't been 'cleared' by routine security sweep.
What DL flight operates nonstop from South America to LAX?