AAR90 From United States of America, joined Jan 2000, 3525 posts, RR: 45
Reply 3, posted (14 years 11 months 3 weeks 3 days 23 hours ago) and read 1319 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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