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Oil discoloration associated with carbon particles - Civil Aviation Safety Alerts (CASA) No. 2016-01
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… Owners/operators and maintainers of Pratt & Whitney PT6A engines Issuing Office: National Aircraft … of this Civil Aviation Safety Alert is to reiterate to PT6A operators the importance of compressor and turbine … detailed in P&WC Service Information Letters (SIL) PT6A-144 R2 (Compressor and Turbine washes as an effective …
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