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According to a wiki report from a few years ago (not specific to this accident - and not suggesting that wing flutter or structure was an issue in this case ):
FAA review of the in-flight failures did not indicate a single root cause, but instead implicated the potential combination of several design and operation aspects. Our preliminary assessments focused on the strength and stability of the wing structure. Further analysis during the special review found the loads the manufacturer used to design the structure do not meet the design standards for a 1,320 lb (600kg) airplane. Static load test data verifies our conclusion. The special review also identified issues with the airplane’s flutter characteristics, stick force gradients, airspeed calibration, and operating limitations.[26]
If this is right, how did it pass ATSM tests?
News is saying its a "kit" plane but I'm pretty sure this is an SLSA.
That quote is from a home built accident several years back. That model has since then been through a wing spar upgrade and new specifications regarding adjustment of elevator cables.
As the owner of a AMD built 601xl I take notice of any news related to a 601XL. From what I am reading on this acident it looks more like he hit a tree after take off. To my knowlage there has not been a single reported case of a 601XLB (the B standing for a wing upgraded aircraft) involved in a crash from coming apart due to wing flutter.
nbjeeptj wrote:As the owner of a AMD built 601xl I take notice of any news related to a 601XL. From what I am reading on this acident it looks more like he hit a tree after take off. To my knowlage there has not been a single reported case of a 601XLB (the B standing for a wing upgraded aircraft) involved in a crash from coming apart due to wing flutter.
Thanks for the info on the model "B". Did they recall and upgrade existing planes or are they out there unmodified?
The B is not added to the registration, it is more of a way in a fourm or when you list it for sale to designate it as having the wing mod complete. AMD issued a AD for the SLSA, so for a SLSA if it is currently flying it either has a ferry permit to fly it to get modified, or it has been completed. It was not mandatory for an AB or ESLA, so it possible that they are flying without the mod complete, tho probably a terrible idea.
The FAA registry shows the manufacturer as AMD, so that identfies it as clearly an SLSA (factory built). The AOPA warning predates the wing mod, and since the AD was issued 5 years ago, the only way this one could have been flying unmodified is if it was 5 years out of annual.
The opinions posted are those of one CFI, and do not necessarily represent the FAA or its lawyers.
Prof H Paul Shuch
PhD CFII DPE LSRM-A/GL/WS/PPC iRMT
AvSport LLC, KLHV [email protected]
AvSport.org
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