Twas not an -80 that landed without Dunlops in Houston, but a DC 9, not that it makes it any less excusable.
Silly accident of course but why did Douglas have low / hi positions on hydraulic pumps, strange system, I realise they should have seen red lights, however.
On more than one occasion I made the same error (albeit on the ground) forgetting to put the hyd pumps back to hi after starting the second engine.
Predictable result was gear not retracting until I woke up and reselected hi on the pump position
