PRATT & WHITNEY CANADA NUMERICAL INDEX OF SERVICE INFORMATION LETTERS(42)

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PT6T-020 EXPIRED  - J. Stothers/ P. DiRico  Feb 22/1999  Feb 22/2000  P3 Filter Assembly Self Closing Drain Valve SB5309/SB5359 P3 Filter Modi.cation PT6T Maintenance Manuals  All PT6T Engines 

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PT6T/ST6T SIL’s
PRATT & WHITNEY CANADA
NUMERICAL INDEX OF SERVICE INFORMATION LETTERS
S.I.L. No.  Rev. No.  Originator  Date Issued  Expiry Date  Subject  Engine Model Applicability 
PT6T-021  - J. Stothers/ P. DiRico  Apr 01/1999  Presence of Silver Flakes in the Oil System  All PT6T Engines 
PT6T-022 EXPIRED  0  J. Stothers/ R. Pobjoy  Jul 08/1999  Jul 08/2000  Carbon in Oil  All PT6 Engines 
PT6T-023  1  J. Stothers/ P. DiRico  Jun 15/2000  Service Bulletin 5414, Improved Clutch Carbon Seal Gasket  All PT6T Engines 
PT6T-024  1  J. Stothers/ P. DiRico  Jun 15/2000  Reduction Gearbox (RGB) Clutch Assembly -2500 Hour Special Inspection  PT6T-3BE, PT6T-3D, PT6T-6B Engines 
PT6T/ST6-025  - R. Day  Mar 31/2000  Shipment of the Automatic Fuel Control with Detailed Parts, Inlet Screen Assembly and Filter Seat  All PT6T/ST6 Engines 
PT6T-026 EXPIRED  - R. Day  Apr 20/2000  Apr 20/2001  Torque Limiter P/N 3038727 (Supplier P/N 3244866-1)  (Post SB 5267) PT6T Reduction Gearboxes 
PT6T-027 EXPIRED  - J. Stothers/ P. DiRico  Jun 15/2000  Jun 15/2001  SB5434 Oil to Fuel Heater -Replacement of  All PT6T Engines 
PT6T-028 EXPIRED  - J. Stothers/ P. DiRico  Jun 15/2000  Jun 15/2001  Removal of Aeroshell 555 and Royco 555 Brand Turbine Oils from SB5001 -Approved Listing for Synthetic Lubrication Oils  All PT6T Engines 
PT6T-029  - R. Day  Jan 22/2001  Supersedure of Special Instruction 1-73 Cleaning Procedure  PT6T-3, PT6T-6, ST6T-75, ST6T-76 Engines 
PT6T-030  - J. Stothers/ C. Thibodeau  Dec 07/2000  Compressor Bleed Valves  PT6T-3/-3B/ -3BE/ -3BF/-3BG PT6T-3D/-3DE/ -3DF PT6T-6/-6B Engines 
PT6T-031 EXPIRED  - P. DiRico  Dec 21/2000  Dec 21/2001  Oil to Fuel Heater -Inspection Procedure  PT6T-3/-3B/ 3BE/3BF/3BG /-3D/-3DE /-6/-6B Engines 

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PT6T/ST6T SIL’s
PRATT & WHITNEY CANADA
NUMERICAL INDEX OF SERVICE INFORMATION LETTERS
S.I.L. No.  Rev. No.  Originator  Date Issued  Expiry Date  Subject  Engine Model Applicability 
PT6T-032  - J. Stothers/ J. DiRico  Mar 05/2001  Compressor First Stage Rotor Blades -Changes to Maintenance Manual Inspection Procedures and Addition of Repair Procedures  PT6T-3, PT6T-6 Engines 
PT6T-033 EXPIRED  - J. Stothers/ P. DiRico  May 31/2001  May 31/2002  Compressor Stall -Causes and Recommended Maintenance Procedures  All PT6T Engines 
　
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