I will be interested to see if this 3% rate is maintained with this new lead free solder. I suspect the failure rate by two years is going to be very high. You watch!
I'm with TLS Guy on this one.
Lead-free solder is an accident waiting to happen.
Last year, Europeans barred the toxic metal from most electronics to prevent its being incinerated or accumulating in dumps after computers and other gadgets are tossed out.
Some companies say the EU rules threaten the reliability of their products, exposing them to unknown risks and possibly threatening people's safety.
The industry-accepted alternative to leaded solders is lead-free tin, which spontaneously can sprout single crystal hair-like growths, or “tin whiskers.”
These growths are electrically conductive, can grow in days or years, and can easily bridge between contacts, can touch each other, to cause electrical problems, and can break off to bridge board traces
I've read articles about these problems in military applications, like the Tomahawk cruise missile, Sidewinder air-to-air missile, and Joint Direct Attack Munition. Also satellites sustained partial or complete loss due to tin whiskers. These involved Galaxy-3, Solidaridad 1, Direct TV3, satellites.
Lead free solder problems also have been reported with the F-15 jet fighter radar, the Patriot missile.

I'll look for the story and post it in The Vent.