The "A" series hub is affected by AD 2001-23-08 and HC-SB-61-227 which said to replace with a "B" series hub by 2000 hrs or 24 Dec 2006 and to do 100 hr eddy current inspections until then. Being that we're experimental we're not required to comply with the AD, but would still be wise to comply with the hour requirement in my opinion.
Why is the "A" hub worthless?
...There is an FAA finding that experimental aircraft do have to comply with AD's that pertain to their certified components... IE, Engines and Props.
That is a little miss information. The "A" hub is still quite valuable to people that are running NON acrobatic aircraft under 300HP.
The basic 180HP AD only applies to the E and Non-suffix hubs, therefore an "A" hub would be terminating action for someone with a Mooney or Piper Arrow.
That said, Since "B" hubs go for around $1500-2000, I'd imagine an "A" hub is worth between $700-1000. The rest of the prop is anyone's guess.
There is an FAA finding that experimental aircraft do have to comply with AD's that pertain to their certified components... IE, Engines and Props.
That's also misleading... There are no "certified" components on an E-AB aircraft.