Yep, I’ve seen the same thing happen twice. The first was up on the North Slope. As I was getting out of the chopper with my hands full the updraft ripped off my ballcap and the main rotor cut it in two. We had to shut down the copter and inspect the blades. Apparently the leading edge is somewhat resilient but the rest isn’t, built with different parameters in mind. Fortunately no damage except to my pride, being the program chief.
Then about a month later we’re in Eagle where the Yukon comes in from Canada, I’m riding with the pilot in a real tight forested area trying to land in a space only feet larger than our copter and we nick a little pine cone coming down. Immediately I can feel a difference in the smoothness of the rotor airflow, it’s a little buffeted. We flew back to camp, did an inspection and we’re going to need an entire new main rotor. Eagle is so far off the beaten path, I think we had to have it flown by another company chopper all the way from Homer but I do remember it was days, probably 3 or 4, before it got there and a master mechanic and help had to come along with it to do the switch. There’s understandably some real precision tinkering that must be done to get it just right. It was easily 7 or 8 days before it was good to go again.
I remember Jim, the pilot, was so broke up about the money he’d cost his boss. He was off for a few days, went up to some mountaintop and tore up his pilot’s license. He made up for it by just going back to work and being a model pilot but yeah, I was kinds worried he was going to quit there for awhile. He was a Nam vet, real Zen kind of guy and the mistake really shook him up.