It's much more than fiduciary duty.
GD has a lot to answer as well in trying to sell a bad deal to the share holders. A person in his position must have the best assessment of the value of the company known to him when any offer comes along.
All the principles of programs like Lean sigma have been put time and time again by staff to management .....FOR FREE!!! and they they don't listen, so off they go spending tens millions of dollars on Lean Sigma to do the same.
As for Avalon Heavy Maintenance, with good LAMEs' and AME's jumping ship, the clock is ticking before all the work goes OS.