Don’t blame me – if the FAA says it’s a MacDac then a MacDac it is. Anyway, David YJ Hsu in the Los Angeles Aircraft Certification Office, whose happy job it is to keep a caring eye on the nation’s Daks, wants you to know that the tailwheel may fall off. He just wants you to know that – he’s not saying you should necessarily worry or anything, and he’s issued a Special Airworthiness Information Bulletin, the recommendations of which, he stresses, are not mandatory.
What happened was that on 25 February a Dak experienced tailwheel fork failure during rollout after landing. Turned out to be due to a crack from a fastener hole which was probably “present for some time”. As the aircraft had 19,482 hours on the clock it’s hard to know for just how much time.
Mr Hsu notes that “currently there is no specific inspection requirement of the tailwheel area” (apart from checking that you’ve got one) and so he’s devised a rigorous inspection regime to prevent the above related embarrassment happening to you too. It involves “proper lighting” and a “magnifying glass”. He comments that you could do this “during other maintenance activities”. (Phew!) And he feels that you should repeat it annually. Up to you though. Gratuitous Daks pic below from Classic Flight.