Originally Posted by
petermcleland
...The T3 was limited to 35,000 feet and had no "Drop Down" passenger oxygen system.
All those years of pax briefings on the Shuttle T3s (and also the T1s they used at first) and I never noticed this. The Caravelle was the same but when these were sold to United Airlines in the US the FAA would not allow this and they had to be re-engineered with an overhead oxy system. The Trident of course was never certified in the US - or was it ?