Page 8-2
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
Page 8-3
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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