PRATT & WHITNEY CANADA NUMERICAL INDEX OF SERVICE INFORMATION LETTERS(36)

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EXPIRED  Improved Fuel Control Unit (FCU) Con.guration  PT6A-66D Engines 
PT6A-142  - J.P. Huot  May 24/2006  Introduction of an Improved Reduction Gearbox Scavenge Line  PT6A-42A Engines 
PT6A-143  0  G. Mulas  Dec 04/2006  PT6A-67B Fuel Control Bellows Replacement  PT6A-67B Engines 
PT6A-144  2  G. Mulas  Mar 16/2010  Compressor and Turbine washes as an effective means of preventative maintenance  All PT6A Engines 
PT6A-145  1  K. Kenny  Aug 07/2006  Introduction of Improved FCU Con.guration  PT6A-65B, PT6A-65AG, PT6A-66A, PT6A-67AF, PT6A-67AG Engines 
PT6A-146  0  G. Mulas  Oct 25/2006  PT6A-114 & -114A Compressor Turbine Blade Maintenance  PT6A-114, PT6A-114A Engines 

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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-147  1  D. Chapleau  Jul 10/2009  Aircraft Engine ITT Gauge Markings for PT6A-34  PT6A-34 Engines 
PT6A-148  1  D. Meisels  Jan 23/2009  Cleanable .lters part marked ″NONCLEANABLE″  All PT6A EXCEPT PT6A-6, PT6-20, PT6A-25, PT6A-50, PT6A-116 Engines 
PT6A-149  2  D. Meisels  Feb 11/2010  Maintenance of Engine Fuel Pump Drive and Coupling Shaft Assembly  All PT6A Engines 
PT6A-150  0  D. Meisels  Oct 09/2007  Oct 09/2008  Compressor Inlet Case  PT6A-41 
EXPIRED  Commercial Package  PT6A-42 
PT6A-60A 
PT6A-61 
Engines 
PT6A-151  0  G. Mulas  Nov 06/2007  Nov 06/2008  Parts Availability for  All PT6A 
EXPIRED  Service Bulletins  EXCEPT 
PT6A-6, 
PT6A-50 
Engines 
PT6A-152  1  G. Mulas  Mar 15/2011  Data Collection Unit Corruption  PT6A-68C 
PT6A-153  0  M. Guerra  Apr 22/2008  Apr 22/2009  Recommended  PT6A-34 
EXPIRED  Minimum Service Bulletin List  PT6A-34AG PT6A-34B PT6A-36 Engines 
PT6A-154 EXPIRED  1  G. Mulas  Jul 17/2009  Jul 17/2010  2009 Conferences for PT6A Powered Aircraft  All PT6A Engines 
PT6A-155  0  G. Mulas  Sep 16/2008  In-Flight Shut-Down Event following malfunctioning Fuel Control Bellows  PT6A-65AG PT6A-65B Engines 

Page 6-17

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 
　
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