On 01/06/2017 07:32 AM, David Bridgham wrote: > On 01/05/2017 08:13 PM, allison wrote: > >> Lots of ifs, mights, and maybes. My knowledge is from actually owning >> and maintaining a Cessna since 1979 and so far that has not been an issue. > Yup, that's just how the discussion in the aircraft community went. One > group would point out that Simple Green contained chemicals known to > corrode aluminum while another group would say they'd been using the > stuff on their airplanes and hadn't noticed any problems. Then the > company came out with Simple Green Extreme, promoting it as being safe > for aircraft though never actually saying, as far as I saw, that the > regular Simple Green wasn't safe. > > I see that as the maker responded to a perceived problem and did their marketing!
The bottom line is its seriously off topic and likely not an issue. To get on topic over the years I've used a number of things deemed bad with full success. An example was a few Altair era board with green crud plus dirt from the prior holder storing them. The green crud was the gold over copper plated contacts without nickel over copper. I decided to keep them and ran them through the dishwasher with the usual dishwasher caustic cleaner (cascade) and the oven dry them. They came out looking better than factory and it even cleaned the contacts. They tested fine and I stripped the damaged gold and re-plated the contacts with electroless tin (didn't have the materials for nickel then gold) and sill have them. Back then the locals on the board told me the boards would be ruined. When doing repairs or restoration the person/organization doing it needs to fist have goals, then process, and the skills to implement them and maybe even mitigate side effects. What process they use and can apply is dependent on available materials and the available skills. Our advantage now is is world wide near instant communication to ask what is best, easy, fast, or cheap. I envy the chance to restore a LGP-30 or for that fact play with one. Many of the things I remember mid sixties on are now gone or were rare then. Like small desk sized drum computers using transistors or first generation IC (RTL and RDTL). Allison
