AAR90 From United States of America, joined Jan 2000, 3471 posts, RR: 47
Reply 3, posted (14 years 2 months 3 weeks 6 days 5 hours ago) and read 1128 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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