I flew 707/720s in the old days, all positions, F/E, F/O and Captain.
With PanAm, and when on layoff, with many operators.
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I recall each time I flew one I was not familiar with, had to look on F/E panel what configuration we had.
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All were different configurations, 2 or 3 TCs, bleeds, or no bleeds.
TWA machines had no bleeds, all had freon packs.
TWA never had bleed sources (at least the ex TWA machines I flew).
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AA had freons packs, as well, 2 TCs 4 bleeds...
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With PanAm, we had nš 4 cowling of TCs, but none were installed.
All were air cycles with PanAm, except some TWA airplanes delivered to PanAm.
Except the 720-030Bs we got from LH...
The QF 707-138Bs (despite almost 720-size body) had 3 TCs... I flew one, a rocketship.
I nicknamed the 707-138B "the 707 SP"...
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So if you tell me "my 707s were different", I will believe you.
And sadly, I flew many for their "last flight" before conversion to beer cans...
The last ones I flew, were in the early 1990s... to Mojave.
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Famous last words in a 707 or 720 cockpit, "where are the switches...?" -
Forward or aft for ON/OFF...?
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My love of the 747 is because it is a grown-up 707, with all the 727 goodies.
Thank you guys to remind me the old days.
10 months to retirement for me...
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Happy contrails