PRATT & WHITNEY CANADA
NUMERICAL INDEX OF SERVICE INFORMATION LETTERS
S.I.L. No. Rev. No. Originator Date Issued Expiry Date Subject Engine Model Applicability
PT6A-025 2 M. Letarte Oct 06/2010 Embodiment of New CT Vanes in Lieu of Repaired/Exchanged: Warranty Consideration PT6A-65AR, PT6A-65B, PT6A-65R, PT6A-67D, PT6A-67R Engines
PT6A-026 - Never Issued
PT6A-027 - V. Mastrocola Jul 31/1996 Inspection of Front P3 Tube Assembly All PT6A Engines
PT6A-028 - L. M. Trottier Jul 16/1996 Stolen Parts Superceded by Gen-031 PT6A Engines
PT6A-029 - V. Mastrocola Apr 29/1997 Apr 29/1998 Soft Time Replacement PT6A-65B/
EXPIRED Recommendation for -65R/-65AR/
First Stage Power Turbine (PT) Blades -65AG Engines
PT6A-030 2 A. Chevalier Jun 13/2001 ″No Charge Exchange″ Coverage for Accessories PT6A-34, PT6A-64, PT6A-21, PT6A-42, PT6A-42A, PT6A-60A, PT6A-65B, PT6A-67A, PT6A-67B, PT6A-135, PT6A-66, PT6A-65B, PT6A-67D Engines
PT6A-031 - V. Mastrocola Nov 27/1996 Nov 27/1997 SB1538/SB3344/ All PT6A
EXPIRED SB4204/ SB12134/SB13287/ SB14251 One Time Inspection of Compressor Bleed Valve Engines
PT6A-032 1 L. Bourque Jan 07/2004 Re-classi.cation of Small PT6A Vanes All PT6A Engines
PT6A-033 EXPIRED - V. Mastrocola Jan 14/1997 Jan 14/1998 Commercial Support Program for Improved Oil Filler Tube PT6A-11AG/ -15AG/-34AG Engines
PT6A-034 6 G. Mulas Jan 30/2009 Engines -Discolored Oil PT6A-67B Engines
Page 6-3
PT6A 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
PT6A-035 - V. Mastrocola Feb 19/1997 Feb 19/1998 Propeller Governor - PT6A-10, -11,
EXPIRED Eccentric Cover Screw Replacement -11AG, -15AG, -20A, -20B, -21, -25, -25A, -25C, -27, -28, -34, -34AG, -34B, -36, -38, -41, -41AG, -42, -45A, -45B, -45R, -60A, -61, -64, -65AG, -65AR, -67B, -65R, -67B, -110, -112, -114, -114A, -116, -135, -135A Engines
PT6A-036 EXPIRED - M. Dermarkar Feb 24/1997 Feb 24/1998 Revision of Agtoil 23 and Agtoil 24 All PT6A Engines
PT6A-037 EXPIRED 1 V. Mastrocola Aug 12/1998 Aug 12/1999 Conversion of Hours to Cycles All PT6A Engines
PT6A-038 - V. Mastrocola Apr 09/1997 Apr 09/1998 Revised P3 Tube and PT6A-11/
EXPIRED P3 Filter Drain -11AG/ -15AG/ -25/-25A/ -25C/-27/ -28/-34/-34B /-34AG/-36/ -110/-112/ -114/-114A/ -135/-135A Engines
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