To: Joe Pilot.
Robinson didn't impose the restrictions the FAA imposed them. If Robinson had in effect met the design criteria then the ammendment to the POH would never have been issued. The problem is that the rotor head is the same as it was when the certification process was going on and the question begs being asked, did the rotor head meet the original design specs, or did Frank Robinson say that it did, and signed it off without testing it as a new and unusual design?
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The Cat