One company took out the forward airstairs on their 111s to save weight only to have to replace them with concrete to keep them within the C of G limits.
No names no pack drills as I’ll get censured again.
The hard landing was part of the certification process which required a no flare landing at max weight with tailwind. Not long after the aircraft came into service a reinforcing patch was riveted above the forward entrance door.
it was a lovely aircraft to fly and only had one notable incident after hitting an extreme inversion which gave us at tailwind component of 23 knots and a large temperature increase which put us outside of the WAT limits and nearly saw us in the Schwarzwald as our flight procedures couldn’t cope.