BoeingBoy
Veteran
- Nov 9, 2003
- 16,512
- 5,865
- Banned
- #16
When pushing back from the gate, you're right. "On the ground" encompasses a lot more than merely pushing back from the gate.
On the general subject, the pack(s) are activated shortly after engine start, so air is being pumped into the cabin. Even with the outflow valve open there would be some resistance to outside air entering the cabin through a faulty door seal. That's why it's much more likely, if the odor was engine exhaust, that the engine(s) were sucking in the air and pumping it into the cabin via the pack(s).
Jim
On the general subject, the pack(s) are activated shortly after engine start, so air is being pumped into the cabin. Even with the outflow valve open there would be some resistance to outside air entering the cabin through a faulty door seal. That's why it's much more likely, if the odor was engine exhaust, that the engine(s) were sucking in the air and pumping it into the cabin via the pack(s).
Jim