Three years ago the rules on the use of lead free solder came into force. Severe repercussions
were forecast. And
an allusion to the possible problem has been made in the Military Aircrew section of this forum. Now in my day, some environmental concerns did arise - for example, banning cadmium-plated earthing studs. But the lead-free thing did seem to have possible reliability and even flight safety issues. Have these become apparent - or in practice has good quality control been enough to ensure good performance?