Pinecone Posted October 14, 2022 Report Posted October 14, 2022 The problem is, the weights that are cracking and subject to the SB are not all lead. It seems it is a slug in some other metal outer part. I don't know if the slug is lead or the outer part is lead. With the two metals in contact, you can get galvanic corrosion and when lead corrodes, it expands. And it appears to me, that the expansion of the lead is leading to the cracking. Quote
carusoam Posted October 15, 2022 Report Posted October 15, 2022 Expect that the outer layer is an alloy… it is harder and has cracked…. Softer materials have a tendency to get damaged easily, and stretch in place of cracking…. lead is really soft… PP guesses only, not a metallurgist… Best regards, -a- Quote
TomM20F Posted October 15, 2022 Report Posted October 15, 2022 This post is related to another post in the forums. There is a new service bulletin from Mooney on the elevator cracking. see the forum topic for more information. Mooney Service bulletin M20-345 1 Quote
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