David R. The BVM website is leaving embodiement of ths mod to the discretion of the user. (if you have been flying your Kingcat etc etc) That is where I think he is fundamentally wrong. This mod, should be mandatory as failures, with potentially catastrophic results, may be totally unpredictable, this unpredictability is one of the major unknowns in the increasing use of composites in fullsize aircraft production, no one really knows the ultimate life of these materials. I think about that everytime I inspect, then fly, a 20 yearold glass fiber Astir sailplane. Just two weeks or so ago a Ka7 glider in the UK ( fullsize) lost both wings with presumably fatal results, a totally unpredictable occurrence (although that machine is wood and steel tube) as was the inflight breakup of a (model) F18 recently. The Ka7 fleet is, of course, now grounded.

The bottom line is this: there clearly is a boom problem on (some) KingCats and a fix is available. It should be incorporated on all Kingcats, except those known FOR CERTAIN, to have been corrected, strengthened during manufacture, absolutely as soon as possible, no exceptions, no discretion. Just sound aviation practice.

Regards,

David Gladwin.