CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins77% CONFIDENCEOverall confidence: 77%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Boeing's 777 model table (archived): 777-200ER first delivery 02/06/97, in service 02/09/97, first airline in service British Airways; Wikipedia[2]: "entered service with British Airways on February 9, 1997".British Airways introduced the extended-range Boeing 777-200ER into airline service on 9 February 1997, three days after taking the first delivery, making it the launch operator of the 777's long-haul B-market variant.
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