Rolls-Royce Corporation T56 SERVICE INFORMATION LETTER (SIL) Technical Publications Index

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Philip Cooper
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1 Corporation T56 SERVICE INFORMATION LETTER (SIL) Technical Publications Index November 1, 2017

2 Use of the Service Information Letter Compressor Inlet Sensing Probe Torque R Overboard Fuel Venting T56 Series III 2nd Stage Wheel Measurements T56 Series II Unexplained Oil Loss T56 Series III Unexplained Oil Loss Speed Sensitive Valve (Poppet Valve) RGB AEM s ATP and ATP Operation and Maintenance in Erosive Environments Mag Plug Inspection Tool Instructions for 4th stg. Turbine Blade ( ) R Series II 4th Stage Turbine Blades/Wheels, Inspect T56 Engine Overtorque Rear Compressor Bearing ( ), Inspect Cancelled Reduction Gearbox Main Drive Gear, Serviceability Criteria R T56 Solid State Amplifier Adjustment * Rear Carrier Bearing ( ), Inspect PPB--104, Revision Recommendations Cancelled Information Distribution to T56 Operators R* Third Stage Turbine Wheel ( ); Exhibit Request R Engine Fuel nozzle Cleaning R Compressor, Air Inlet Housing, Inspect/Rework R RGB External Oil Pressure Relief Valve--New Gasket Release Cancelled Release of New Spare Part--Prop Brake Facing ( ) Cancelled Series IV only; not available R T56 Engine Torching at High Power Settings * Scavenge Oil System Test Kit How to request and Receive Tech publications Rescinded by R Propeller Shaft Cleaning at Installation Cancelled Series IV only; not available R 5th Stage Compressor Blades (Inspect) Cancelled * Paralleling Valve; Fault Isolation, Repair and Installation Series IV only; not available Series IV only; not available Revised November 1, 2017 PAGE 1 OF 5

3 Series IV only; not available Series IV only; not available R Planet Gear and Bearing Assy. Replaceable Roller Sets Series IV only; not available Cancelled Series IV only; not available Series IV only; not available R* Fuel nozzle Bolt Lubricant R* Enhanced Reliability Gearbox--Kit release R Approved Liquid Gas Path Cleaners Series IV only; not available Cancelled * Oil Foaming * 15 Micron Pressure Oil Filter--Kit Release * LSGI * Turbine Module Installation--Kit Release * T56LFE Engines R T56/501D Series I/II/III/IV Engine Performance Calculation Trending Software and Support Equipment Release R T56/501D Series I/II/III/IV Engine Performance-- Maintenance Ground Check Procedure * Compressor Inlet Blockage R Series II to Series III Conversion Kits Release R* T56/501D Engine Models and Applications R Rolls--Royce Parts Ordering Process New 5th and 10th Stage Bleed Gaskets Cancelled TD Amplifier P/N Recall Cancelled * Minimum Torque Calculation R* T56 Thermocouple Operation and Maintenance th Stage Turbine Blade P/N Military Surplus Alert Cancelled R Allison Repaired Combustion Liner Exchange Program * Allison Repaired 1st/2nd Stage Turbine Vane Exchange Program * Extreme Overtemperature Operation Cancelled Prior to Publication Cancelled Prior to Publication R* Pinion Bearing and Shaft Fit Limits * Prop Shaft Seal Kit (P/N ) Installation & Removal Procedures Revised November 1, 2017 PAGE 2 OF 5

4 96--01* 1st and 2nd Stage Turbine Blade Color Codes R Power Section and Reduction Gearbox Oil Pressure Limitations R Conserving Turbine Life R Improved Fuel Control Start Schedule Cage Assembly, Bearing Front Turbine, Static Seal Material R Improved, Wide--Rim Thick--Bore, 1--2 Turbine Spacer R Rub Tolerant Turbine Vanes and Spacers/IN--718 Material Vane Case R Updated CIT Correction Charts R Fuel Control Speed Piston O--Ring Seal Titanium Nitride (TiN) Coated blades Cancelled Cancelled Prior to Publication Allison Access Center Cancelled * Turbine Rear Inner Exhaust Cone Loss * Rear Turbine Bearing Support Bolt Hole Cracks; Revised Acceptance Criteria Reduction Gearbox Cracking in the Eyebolt Boss and Mounting Pad Area Anti--ice Valve Seal P/N * Water Quality for Engine Wash/Rinse Alternates for ODC/EPA--17 Chemicals * Rear Compressor Bearing P/N P/N nd Stage Turbine Vane, Step In Forward Vane Slot Alternate for Acti--Thane WC--100 Paint New Spring for use in Fuel Nozzle Assemblies Micron External Scavenge Oil Filtration Reduction Gearbox (RGB) -- Main Drive Gear Bearing Failures R P/N Turbine Inlet Case Machining Condition RGB -- Planet Journal Plugs Shipment of Fuel System Components Visual Color Change of 3rd--Stage Turbine Blade, P/N Fuel Nozzle Overhaul Procedures Removal of Rear Turbine Bearing Thermal Insulation Blanket from Turbine Assembly Revised November 1, 2017 PAGE 3 OF 5

5 New Fuel Control Assembly, P/N Improved Starting Fuel Schedule and Speed Piston O--Ring Seal Replacement Engine Split Line Shield, Install Series II 4th--Stage IN901 Turbine Wheel Rear Turbine Bearing Support Cross Key Hole / Slot Repair Fuel Nozzle Upgrade Instructions Custom 450 1st--Stage Compressor Vane Assembly, P/N Series III Turbine 1st--Stage Vane, Improved Durability Part Numbers Reissue , , , and T56--A--7B Energy Absorbing Ring (EAR) New Brackets New Improved Turbine Cooling Air Baffle ( ) For T56/501D Series II Engines T56 Compressor Vane Appearance -- Custom 450 Material P/N , 4th--Stage Turbine Blade Thermocouple Assembly P/N Approval of Metco 73FNS--2 or Metco 72F Plasma Spray as Alternate Repairs for: Vane and Seal Support Internal Diameter ( ) Inner Combustion Casing Piston Ring Grooves ( ) Series II, 2nd--Stage Turbine Vane Segments P/N s and New 5th & 10th Stage Bleed Gaskets P/N s & New Fuel Nozzle Body P/N Coniflex Style Compressor Extension Shaft And Side Gear Configuration Reduction Gearbox (RGB) Carrier Oil Delivery Flange & Sun Gear Lube Tube Assembly Rework New 1st--Stage Turbine Blade P/N Visual Differences From The Original P/N Engine -- Reduction Gearbox, Main Power Train Gears Inspection and Serviceability Series II Turbine Wheel, 4th--Stage Rework Non--Destructive Testing (NDT) Requirements for Prop Control Intermediate Link Rod Assembly & Prop Control Rear Link Assembly Micron External Scavenge Oil Filtration -- Alternate Filter Element P/N s Revised November 1, 2017 PAGE 4 OF 5

6 Replacement of Narrow Rim 1st to 2nd -- Stage Turbine Spacer Assemblies, P/N s and To Clean the Engine of Bird Residue After a Bird Strike Release of Improved 1st--Stage Turbine Blade P/N Turbine Vane Case -- Add Chamfer to Inner Vane Slots Retaining Spring (P/N ) Release Inspection Required Following Metal Generating Failures Turbine Assembly -- Turbine Wheel Inspection Reduction Gearbox Assy -- Pinion Shaftgear Inspection Micron Pressure Oil Filter -- Impending Bypass Indicator Replacement Turbine Assembly -- Turbine Spacer Inspection Use of Accident -- Incident Hardware Repair of 2nd--, 3rd--, and 4th--stage Turbine Vane Inner Diameters Jet Fuel Contaminated with Fatty Acid Methyl Ester (FAME) Reduction Gearbox Assembly-- Two--Piece Starter Drive Shaft Seal Loctite Plastic Gasket 568 (Loctite 56841) Replacement New Solid State Ignition Relay Suspect External Scavenge Oil Pump Assembly P/N Replacement External Scavenge Oil Pump Assembly Inspection for End Face Clearance of Internal Gears Inspection of 1st-- and 4th--stage Turbine Wheels every 2000 Cycles Operation and Maintenance of T56 Series IV Engines in Corrosive Environments * NOTE: This SIL contains the following notice: This SIL will be rescinded five (5) years from the original publish date. This note alone does not cancel the SIL once the SIL has reached five years from the date it was published. The SIL remains in effect until a cancellation notice is issued or the SIL index notes the SIL has been Cancelled. This SIL has been reviewed and the information it contains considered to be current. This SIL will not be revised solely to remove the five (5) year statement, however if the SIL is revised the statement will be removed. Revised November 1, 2017 PAGE 5 OF 5

Rolls-Royce Corporation T56-A-15LFE COMMERCIAL SERVICE LETTER (CSL) Technical Publications Index

Rolls-Royce Corporation T56-A-15LFE COMMERCIAL SERVICE LETTER (CSL) Technical Publications Index Corporation T56-A-15LFE COMMERCIAL SERVICE LETTER (CSL) Technical Publications Index May 1. 2018 1501 T56--A--15LFE Engine Life Limited Parts Cancelled Ref. CSL--1545 1502 Approved Lubricants -- Engine