Would the hypothetical converted 707 AWACS fleet need replacement in the 2000s or 2010s?
Short answerBy about 2000 or earlier, given the scenario's donor aircraft dating from the 1960s.
NotesThe follow-up asks whether the hypothetical converted aircraft would need replacement in the 2000s or 2010s. The answer later returns to the premise that the donor 707 fleet began in the 1960s. Those airframes would therefore already be more than thirty years old around 2000. Replacement is expected by then or earlier. This is an estimate within the proposed conversion scenario, rather than a chronology of aircraft actually acquired for the RAF.