AAR90 From United States of America, joined Jan 2000, 3451 posts, RR: 47
Reply 3, posted (13 years 10 months 2 weeks 4 days 5 hours ago) and read 1099 times:
AA uses 9xxx series flight numbers for non-scheduled operations. It could be ferry flight, extra section (additional flight that day that city pair), maintenance test, charter, or whatever. Flight number does not tell ATC what is on board the aircraft.
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