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IMP Proprietary. 2. Repair of Cracked FS 290 Chemically Milled Web . HistoryCanada's fleet of Sikorsky S-61 (CH124) Sea King Helicopters entered service in 1963 Cracking of the FS 290 structure began within a few yearsNumber and extent of the FS 290 cracks increased over the years Initial
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1 Peter McCallum
21 September 2011 Repair of Cracked Frame Station 290Chemically Milled Web
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