Airways Posted September 14, 2018 Report Share Posted September 14, 2018 Hi guys, I have zero background in maintenance so I'd like to use the massive knowledge present on this forum for feedback on a couple of pictures. Aircraft is an '88 M20K with its second paint job (long ago). The aircraft isn't mine but might (or not) come up for sale. Question is: is the corrosion that I see on the pictures 1) really corrosion and 2) does it need to be adressed urgently ? I'm thinking yes and no. But again, I have nothing to back this up... Thanks ! Quote Link to comment Share on other sites More sharing options...
orionflt Posted September 14, 2018 Report Share Posted September 14, 2018 it is hard to tell `corrosion in pictures, the best way to determine the if it is and the extent is to have an expert look at it. Pic 1 looks like residual from a long term fuel seep Pic 2 I'm not sure what you are trying to show, I do see plenty of grease that was not wiped off after servicing. Pic 3 loos like an exhaust leak that bubble the paint and was painted over after the leak was repaired, but as stated earlier you can't make an accurate assessment from pics, only guesses. Brian Quote Link to comment Share on other sites More sharing options...
Airways Posted September 14, 2018 Author Report Share Posted September 14, 2018 That is already good info Brian ! Thank you, gives me something to work with... Quote Link to comment Share on other sites More sharing options...
carusoam Posted September 14, 2018 Report Share Posted September 14, 2018 Landing gear steel has a tendency to get its paint scratched/worn and light rust occurs. Some people will remove the gear to properly strip and paint it. Some nose gear is so old it gets an OH for wear parts. Storing outside will have more rust on the gear than storing indoors. Real expensive corrosion issues are where certain alloys of aluminum carry weight. All corrosion is not the same. None of it is appreciated. Some is more expensive to fix then others... When corrosion gets found, fixing it now is better than waiting.... Look up surface corrosion and compare to inter-granular corrosion.... and how quickly they can spread. Have no fear, done properly, ownership can be forever.... that third picture is showing something really funny.... paintwise... heat damage and paint over? You want to know what caused that... and how it got repaired properly... read the logs. know what a PPI is, buy as much technical advice as you can... As for this bird... ask the owner while pointing at the cowl issues and say.... ‘what is that?’ listen closely to the response... the repair for that can be really important... Got any technical back ground? Are you familiar with turbo planes? Buying old worn machines with this level of technicality can be expensive. Don’t save money on maintenance if you are not familiar with this stuff... Or get familiar, quickly... PP thoughts only, not a mechanic.... Best regards, -a- Quote Link to comment Share on other sites More sharing options...
Bravoman Posted September 14, 2018 Report Share Posted September 14, 2018 (edited) The landing gear stuff looks exactly what Anthony says above. Probably just needs to be cleaned up and re-painted. Likely no big deal. Edited September 14, 2018 by Bravoman 1 Quote Link to comment Share on other sites More sharing options...
Piloto Posted September 14, 2018 Report Share Posted September 14, 2018 (edited) The brown stains next to the gear attachment bolts are just excess grease coming out of the bolt, perfectly normal. Just wipe clean José Edited September 14, 2018 by Piloto Quote Link to comment Share on other sites More sharing options...
thinwing Posted September 14, 2018 Report Share Posted September 14, 2018 Pics should be of the inner gear well ,aft spar etc...pics shown are unimportant Quote Link to comment Share on other sites More sharing options...
Guest Posted September 14, 2018 Report Share Posted September 14, 2018 Plenty of blue fuel dye in the wheel well. While not terminal, it will need fixing. Clarence Quote Link to comment Share on other sites More sharing options...
jackn Posted September 14, 2018 Report Share Posted September 14, 2018 Bottom picture is paint bubbling from the turbo. May need new heat shielding on the inside cowl. Cowl is fiberglass, paint shop can fix. Quote Link to comment Share on other sites More sharing options...
jetdriven Posted September 14, 2018 Report Share Posted September 14, 2018 Do not count on a paint shop properly fixing fiberglass. Ask them if they vacuum bag it, if they use aircraft structural epoxy, if they use S-glass aircraft fiberglass cloth... Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted September 14, 2018 Report Share Posted September 14, 2018 It doesn't look like there is anything wrong with the fiberglass on the cowl. It looks like the paint failed. It looks like the Krylon they used to touch it up is doing better. Quote Link to comment Share on other sites More sharing options...
Airways Posted September 16, 2018 Author Report Share Posted September 16, 2018 Thanks for all the input guys. I’m thinking of making this a long term restauration project. The engine and prop are up for overhaul so maybe a good time to fix all the dents and bruises and give the interior an update. Let’s see what the prebuy reveals... Quote Link to comment Share on other sites More sharing options...
Yetti Posted September 20, 2018 Report Share Posted September 20, 2018 On 9/14/2018 at 4:15 PM, M20Doc said: Plenty of blue fuel dye in the wheel well. While not terminal, it will need fixing. Clarence I saw that. Pull the rear seat. Pull some covers. Pull the wing root rear most inspection cover look in there. pictures from up in the wheel well would be better. Quote Link to comment Share on other sites More sharing options...
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