From Gordys post on another thread
15) In the GE/Sikorsky prepared "worst case" simulation, the helicopter was alleged to have weighed 19,008 lbs. The Sikorsky performance charts, even using the "stock" rotor blades instead of the composite, high performance blades on N612AZ, show that at this altitude, temperature and wind, the helicopter could lift over 19,100 lbs. Assuming every fact in favour of the NTSB/GE/Sikorsky simulations, N612AZ could have and did fly from H-44 until the No. 2 engine failed.