I wrote a pretty comprehensive paper on this subject about 4 years ago when I was working at Transport Canada. THere are several alphabet groups working on the subject, and my spies in the various authorities have told me that they are finally waking up to the problem.
There should be some more formal guidance on the matter shortly.
My recommendation is to use the maintenance database system called Serive Difficulty Reports (SDR). This is a problem with an installed and approved piece of equipment not working properly, and getting the problems filed might wake up the maintenance / continuing airworthiness folks to the magnitude of the problem.
Shawn