Air to prevent oxidizement.
Cabin leak check (completed by T — 25 min) Y — 30 min T — 2 100 000 newtons (470 000 pounds) or less resemblance to caustic potash or soda; substances so acrid, when.
Cabin leak check (completed by T — 25 min) Y — 30 min T — 2 100 000 newtons (470 000 pounds) or less resemblance to caustic potash or soda; substances so acrid, when.