The Aviation DataBase: Service Information: Safran Helicopter Engines
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Maintenance Manuals
NameRevisionLangSubjectDate
en Arriel 2S111/30/2012
en Arrius 2 B2 - Airworthiness Limitations Temporary Update07/27/2022
Up 20 en Arriel 2D06/15/2020
Up 23 en Arriel 2D12/30/2021
Up 16 en Arriel 2E06/15/2020
Up 19 en Arriel 2E12/30/2021
Service Bulletins
NameRevisionLangSubjectDate
D en Power Plant: Integration of Sand Filter 0617-71-02 QB0777 Sand Filter Installation on ARRIEL Engine12/09/2009
D en Power Plant: Integration of Sand Filter 0617-71-01 Replacement of Sand Filter P/N 350A54-0229-00, P/N 350A54-0229-01, P/N 350A54-230-04 (PALL AEROSPACE Supplier P/N : QB0390) with Sand Filter QB0833 (ARRIEL Engine)12/09/2009
D en Power Plant: Integration of Sand Filter 0617-71-03 Replacement of Sand Filter P/N 704A41-6500-10, P/N 704A41-6500-12 (PALL AEROSPACE Supplier P/N QB0550 or QB0550.01) with Sand Filter QB0833 (ARRIEL engine)12/09/2009
D en Power Plant: QB0777 Sand Filter Installation on ARRIEL Engine12/09/2009
B en Power Plant: Sand Filter 0617-71-05 Integration QB0777 Sand Filter Installation on ARRIEL Power Plant12/09/2009
en Free Wheel Shaft Assembly - Installation of a Free Wheel Flange with a Reduced Clearance06/14/1990
en Embodiment of Modification TU 212 - Free Wheel: New Manufacture (2nd Supplying Source)07/13/1990
en Mandatory Check for Smoke Emission Out of the Exhaust Pipe, the Air Intake or the Turbine Casing Drain During Rundown or After Engine Shut-Down09/14/1998
Up 1 en Mandatory Air Intake Assembly - Drilling of Water Drainage Holes. Incorporation of Modification TU 171A03/25/2005
en Mandatory Fuel Pump - Check of Maximum Fuel Flow11/17/2005
Up 1 en Mandatory Fuel Pump - Check of Maximum Fuel Flow01/08/2007
Up 4 en Mandatory Centrifugal Compressor Inspection/Replacement01/25/2000
Up 1 en Mandatory Oil System - Replacement of Flexible Lubrication Pipe Between Cooler and Tank. Incorporation of Modification TU 23110/11/2007
A en Mandatory Oil System - Replacement of Elastomer-Based Return Intermediate Bearing Flexible Pipe with a PTFE-Based Flexible Pipe. Incorporation of Modification TU 23309/01/2008
C en Mandatory Rotating Assembly - Check of the 3rd Stage Turbine Wheel10/23/2009
A en Rotating Assembly - Reinforced Inspection of 3rd Stage Turbine Wheels P/N 0265257000 or 026525706008/25/2015
A en Mandatory Rotating Assembly - Inspection of the 3rd-Stage Turbine Wheel02/26/2018
en Free Wheel Shaft - Limitation of Dynamic Deflection. Embodiment of the Modification TU 22108/05/1991
Up 1 en Mandatory (a) Reduction Gear Module (M05) - Inspection of the Magnetic Plug Every 8 Hours or Daily Inspection After the Last Flight (b) Incorporation of the Modification TU 39 (Intermediate Pinion with a Thicker Web)04/16/1992
Up 2 en Mandatory (a) Reduction Gear Module (M05) - Inspection of the Magnetic Plug Every 8 Hours or Daily Inspection After the Last Flight (b) Incorporation of the Modification TU 39 (Intermediate Pinion with a Thicker Web)07/30/1993
Up 1 en Mandatory Installation of a Chip Detector with Electric Warning on the Rear Bearing Oil Return. Embodiment of the Modification TU 20804/03/1996
en Reduction Gear Intermediate Pinion. Shot Peened Tooth Root and Rim Provided with a Groove and a Ring. Incorporation of the Modification TU 23207/12/1993
Up 1 en Mandatory (a) Noise Check During Gas Generator Run-Down on Engine Shut-Down (b) Check of the Free Rotation of the Gas Generator During Inspection After the Last Flight of the Day12/27/1993
en Mandatory Checking of Axial Compressor Erosion and Cleaning of the Gas Generator Rotating Assembly for the Engines Operated in Erosive Atmosphere10/16/1998
Up 1 en Mandatory Cancellation of Incorporation of Modification TU 20404/04/2002
en Mandatory Compressor Module - Installation of a Sleeve in the Attachment Boss of the Bleed Valve. Incorporation of the Modification TU 30009/20/1999
en Compressor Module - Installation of a Sleeve in the Attachment Boss of the Bleed Valve. Incorporation of the Modification TU 30009/28/1999
Up 1 en Cancellation of Incorporation of Modification TU 20404/10/2000
Up 2 en Mandatory Compressor Module - Bonding of Sleeve in the Bleed-Valve Mounting Pad04/15/2002
B en Mandatory Reduction Gearbox Intermediate Pinion. Shot Peened Tooth Root and Rim Provided with a Groove and a Ring. Incorporation of Modification TU 23211/06/2008
B en Mandatory 41/23 Tooth Bevel Gear Assembly of Accessory Gearbox (Module M01) Application of TI No. 292 72 0839 or No. 292 72 0840 Referencing Vibration Check11/25/2013
C en Mandatory 41/23 Tooth Bevel Gear Assembly of Accessory Gearbox (Module M01) Application of TI No. 292 72 0839 or No. 292 72 0840 Referencing Vibration Check06/18/2014
B en Mandatory Check of the Centrifugal Impeller and its Possible Replacement04/13/2016
B en Mandatory Module M03 (Gas Generator). Small Labyrinth with Increased Clearance. Application of Modification TU 357 on ARRIEL 1D - 1D111/12/2015
Up 1 en Mandatory M02 Compressor Module - Bonding of Sleeve in the Bleed-Valve Mounting Boss. Incorporation of Modification TU 70A07/26/2001
en Mandatory Module M03 (Gas Generator) - HP Turbine Borescope Inspection04/05/2007
B en Mandatory 41/23 Tooth Bevel Gear Assembly of Accessory Gearbox (Module M01) Application of TI No. 292 72 2849 or No. 292 72 2850 Referencing Vibration Check11/25/2013
C en Mandatory 41/23 Tooth Bevel Gear Assembly of Accessory Gearbox (Module M01) Application of TI No. 292 72 2849 or No. 292 72 2850 Referencing Vibration Check06/18/2014
A en Mandatory Accessory Gearbox Front Cover - Detection of Wear on the 41- or 42-Tooth Gear Front Bearing Housing04/24/2015
D en Mandatory Accessory Gearbox Front Cover - Detection of Wear on the 41- or 42-Tooth Gear Front Bearing Housing09/23/2016
A en Mandatory Check Resistance Values from Torque Conformation Box11/30/2018
C en Mandatory Fuel Control Unit (FCU) - Inspection of Plug Installed on 3-Way Union03/13/2008
en Adjusted HMU - To Ensure Proper Installation of Constant Delta P Device Diaphragm. Incorporation of Modification TU 105.03/29/2005
E en Mandatory Digital Engine Control Unit (DECU) with Software Version V11.01. Incorporation of Modification TU 10909/17/2008
en Adjusted Hydro-Mechanical Metering Unit (HMU) - P3 Cover with Reduced Centering Length and Lubricating Coating. Incorporation of Modification TU 13205/31/2006
en Mandatory Engine Electronic Control Unit (EECU) with Software Version V5.0201/05/2007
G en Mandatory Visual Inspection of Adjusted Hydromechanical Metering Unit (HMU) Drive-Link Splines06/24/2013
Up 2 en Mandatory Visual Inspection of Adjusted Hydromechanical Metering Unit (HMU) Drive-Link Splines06/28/2005
Up 4 en Mandatory Visual Inspection of Adjusted Hydromechanical Metering Unit (HMU) Drive-Link Splines01/02/2007
en Mandatory Adjusted Hydro-Mechanical Metering Unit (HMU) - Check and Replacement of the Constant Delta P Device Diaphragm10/18/2006
C en Mandatory Adjusted Hydro-Mechanical Metering Unit (HMU) - Check and Replacement of the Constant Delta P Device Diaphragm01/29/2009
Up 1 en Mandatory Adjusted Hydro-Mechanical Metering Unit (HMU) - Check and Replacement of the Constant Delta P Device Diaphragm04/03/2007
F en Mandatory Visual Inspection of Adjusted Hydromechanical Metering Unit (HMU) Drive-Link Splines06/21/2013
en Mandatory Adjusted Hydro-Mechanical Metering Unit (HMU) - Replacement of Fuel Filter Drain Screw01/02/2007
A en Mandatory Adjusted Hydro-Mechanical Metering Unit (HMU). Replacement of HYDRA-ELECTRIC Low Fuel Pressure Switch (P/N 9 550 17 956 0)03/13/2008
en Mandatory Adjusted Pump and Metering Valve Assembly. Modification of the Metering Valve Needle Return Spring04/07/2016
en 2nd Stage Nozzle Guide Vane of the Gas Generator - Material NC20T Changed to NC22DNb for the Inner Parts and Abradable Deposit in the Labyrinth Housing. Embodiment of the Modification TU 20204/10/1992
en Installation of a 2nd Stage Nozzle Guide Vane with a New Style Front and Rear Sections with an Abradable Coating in the Labyrinth Housing. Embodiment of the Modification TU 19702/22/1993
en Mandatory Digital Electronic Control Unit (DECU) - LPG Board - Elimination of Irreversibility of 85% NG Backup and Modification of Upper Threshold for Detection of a "Collective Pitch" Occurrence04/05/2006
en Digital Engine Control Unit (DECU) - Software Version 9 Upgraded to Software Version 11. Incorporation of Modification TU 244C02/02/2006
en Mandatory Electronic Control Unit (ECU) - Modification of Comparator/Selector Board (Reversible 65% N1 Backup Law and Irreversible Illumination of "GOV" Light)03/23/2007
en Mandatory Fuel Control Unit (FCU) - Maximum Fuel Flow Check09/17/2002
A en Mandatory Electronic Control Unit (ECU) - Installation of Two Post TU 250 Comparator/Selector (C/S) Boards from the Same Manufacturing Batch on the Same Aircraft is Prohibited02/12/2008
B en Mandatory Electronic Control Unit (ECU) - Replacement of Post TU 250 Comparator/Selector (C/S) Boards from a Same Manufacturing Batch.04/27/2009
B en Mandatory Check and Replacement of Potentially Non-Compliant N2 Sensor Harnesses08/23/2011
1 en Mandatory Module M02 (Gas Generator) - Gas Generator Stop SNFA Bearing09/19/2006
Up 1 en Mandatory Fuel Injection System - Installation of a Device for a Separate Supply of Fuel for One of the Main Injector. Incorporation of the Modification TU 6312/22/1997
Up 1 en Mandatory Engine Electronic Control Unit (EECU) with Version 9 Software. Incorporation of Modification TU 80C02/13/2004
Up 1 en Mandatory Engine Electronic Control Unit (EECU) with Version 9 Software (with Overspeed Protection Option)02/13/2004
C en Mandatory Engine Electronic Control Unit (EECU) with Software Version 6. Application of Modification TU 82C07/31/2008
D en Mandatory Engine Electronic Control Unit (EECU) with Software Version 6. Application of Modification TU 82C06/06/2011
Up 1 en Mandatory Engine Electronic Control Unit (EECU) with Software Version 6. Application of Modification TU 82C02/13/2004
en Mandatory Electronic Engine Control Unit (EECU) with Version 6 Software. Incorporation of Modification TU 90C02/13/2004
G en Mandatory Visual Check of Adjusted Pump & Metering Valve Assembly Drive-Link Splines01/24/2013
J en Mandatory Visual Check of Adjusted Pump & Metering Valve Assembly Drive-Link Splines03/15/2019
Up 1 en Mandatory Electronic Engine Control Unit (EECU) - Replacement of Tantalum Capacitors12/21/2006
Up 1 en Mandatory Fuel Control Unit (FCU) - To Ensure Proper Installation of Constant Delta P Valve Diaphragm. Incorporation of Modification TF 55.03/17/2006
A en Mandatory Fuel Control Unit (FCU) - Removal of FCUS to Check, in Repair Center, that Groove is Present on Each Bearing Assembly10/21/2024
A en Mandatory Inspection of Clearance between the P3 Air Pipe (First Section) and the RH Rear Half-Wall05/14/2008
B en Mandatory Inspection of Clearance between the P3 Air Pipe (First Section) and the RH Rear Half-Wall01/25/2011
A en Mandatory Consistency Check of Engine TQ (Torque) & MGT (Measured Gas Temperature) Conformation Values11/14/2022
en Lubrication Unit - Oil System Check Valve with Seal-Free Piston. Incorporation of Modification TU 122.03/14/2006
B en Mandatory Lubrication Unit - Check Valve with Seal-Free Piston. Incorporation of Modification Tf 7505/14/2008
B en Mandatory Visual Inspection of the Drive-Link Splines of the Lubricating Device10/21/2014
en Mandatory Lubrication Device - Check of the Nozzle Bonding on the Ejector Assembly05/22/2013
B en Mandatory Lubrication Device - Check of the Nozzle Bonding on the Ejector Assembly02/12/2015
Up 2 en Mandatory Alert Central Labyrinth Inspection/Replacement01/23/2004
en Mandatory Alert Equipment/Accessory - Check for Cracks on Lower Union of Flexible Fuel Pipe Between Electric Fuel Cock and Start Valve05/02/2006
H en Mandatory Alert Check / Replacement of Centrifugal Compressor05/21/2015
Up 5 en Mandatory Alert Check / Replacement of Centrifugal Compressor02/25/2005
Up 1 en Mandatory Alert Equipment/Accessory. Check of Flexible Lubrication Pipe Between Tank and Cooler and of Flexible Lubrication Pipe Between Intermediate Bearing and Oil Pump03/22/2006
Up 2 en Mandatory Alert Equipment/Accessory. Check of Flexible Lubrication Pipe Between Tank and Cooler and of Flexible Lubrication Pipe Between Intermediate Bearing and Oil Pump02/23/2007
A en Mandatory Alert Oil System - Oil Leak Check at the Two Unions on the Intermediate Bearing Return Flexible Pipe12/15/2009
en Mandatory Alert Axial Compressor - Ultrasonic Inspection of 2nd Stage Axial Wheel Blades02/05/2004
A en Mandatory Alert Replacement of a Batch of Potentially Non-Conforming Fire Detectors12/14/2022
B en Mandatory Alert Replacement of a Batch of Potentially Non-Conforming Fire Detectors05/16/2023
Up 6 en Alert 2nd Stage Nozzle Guide Vane of the Gas Generator - Change of Material for the Inner Parts and Abradable Deposit in the Labyrinth Housing09/04/2000
Up 2 en Mandatory Alert Installation of a Containment Shield Ring Made of INCO 625 (11. 4 mm Thick). Embodiment of the Modification TU 25410/23/2000
Up 2 en Mandatory Alert Installation of an Additional Containment Shield Ring Made of Z10CNT 18-11 (11. 4 mm Thick).10/23/2000
C en Mandatory Pre TU 360 Engines - Operation in a Dusty Atmosphere - Determination of the Limit for First Cleaning of the Gas Generator Rotating Assembly - Determination of the Optimal Cleaning Frequency for the Gas Generator Rotating Assembly02/29/2012
en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades06/14/2000
Up 1 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades09/13/2000
Up 2 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades07/16/2001
Up 3 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades07/29/2002
Up 4 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades08/22/2003
Up 5 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades03/24/2004
en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of Pre TU 347 2nd Stage Turbine with an Inspected Pre TU 347 2nd Stage Turbine or with a Post TU 347 2nd Stage Turbine03/24/2004
C en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of Pre TU 347 2nd Stage Turbine with an Inspected Pre TU 347 2nd Stage Turbine or with a Post TU 347 2nd Stage Turbine10/03/2008
D en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of Pre TU 347 2nd Stage Turbine with an Inspected Pre TU 347 2nd Stage Turbine or with a Post TU 347 2nd Stage Turbine07/24/2009
E en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of Pre TU 347 2nd Stage Turbine with an Inspected Pre TU 347 2nd Stage Turbine or with a Post TU 347 2nd Stage Turbine10/29/2009
Up 1 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of Pre TU 347 2nd Stage Turbine with an Inspected Pre TU 347 2nd Stage Turbine or with a Post TU 347 2nd Stage Turbine10/26/2006
Up 1 en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades and Replacement of 2nd Stage Turbine by and Inspected 2nd Stage Turbine Fitted with New Blade10/04/2005
en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades03/24/2004
B en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades10/03/2008
C en Mandatory Alert Relative Position Check of 2nd Stage Turbine Blades07/24/2009
A en Mandatory Alert Module M05 (Reduction Gearbox) - Securement of Post TU 332 Lubrication Ducts05/27/2009
B en Mandatory Alert Module M05 (Reduction Gearbox) - Securement of Post TU 332 Lubrication Ducts10/06/2009
A en Mandatory Alert Free Turbine (M04) - Restricted Use Limit of the FT Blades03/20/2009
C en Mandatory Alert Free Turbine (M04) - Restricted Use Limit of the FT Blades07/15/2009
A en Mandatory Alert Module M04 (Free Turbine) - Check of the Presence, Positioning and Bonding of the Free Turbine Bearing Plug05/24/2013
en Mandatory Alert Module M03 (Gas Generator) - Check of Free Turbine Shield06/27/2005
A en Mandatory Alert Free Turbine (M04) - Restricted Use Limit of the FT Blades03/20/2009
C en Mandatory Alert Free Turbine (M04) - Restricted Use Limit of the FT Blades07/15/2009
B en Mandatory Alert Module M03 (Gas Generator) - HP Blade Dampers - Application of Modification TU 16609/20/2010
A en Mandatory Alert Module M03 (Gas Generator) - HP Blade Dampers - Application of Modification TU 16603/23/2012
A en Mandatory Alert Module M03 (Gas Generator) - HP Blade Dampers - Application of Modification TU 16606/18/2012
Up 2 en Mandatory Alert Check of the Installation of the Fuel Unions of the Ignition Solenoid Valve02/05/2001
B en Mandatory Alert Ejector Assembly - Inspection for Assembly Compliance of the Ejector02/08/2011
A en Mandatory Alert Drain Valve Assembly (DV) Containment01/31/2017
A en Mandatory Alert Drain Valve Assembly (DV) Containment04/07/2017
Up 1 en Mandatory Alert Inspection and Lubrication of HMU Acceleration Control Axle11/01/2005
Up 2 en Mandatory Alert Inspection and Lubrication of HMU Acceleration Control Axle12/15/2006
B en Mandatory HMU - Check of the Low Pressure Fuel Pump Impeller Drive07/10/2009
A en Mandatory Alert Hydro-Mechanical Metering Unit (HMU), Inspection and Reconditioning of the LP Impeller/HP Shaft Link08/17/2010
A en Mandatory Alert Adjusted Hydro-Mechanical Metering Unit (HMU) - Functional Tests07/04/2011
A en Mandatory Alert Hydro-Mechanical Unit (HMU) - Replacement of the Rotating Components of the HP and LP Pumps at 800 Operating Hours05/29/2012
A en Mandatory Alert Replacement of a Batch of Potentially Non-Conforming Fire Detectors12/01/2022
en Mandatory Alert Cancel the Authorization for Using 7. 5 cSt Oil and Instruction to be Followed if this Oil has been Used12/22/1997
Up 1 en Mandatory Alert Incorporation of Modification TU 200A is Cancelled02/18/2002
B en Mandatory Alert Module M02 & Module M03 - Correction of Cycle Count on Some Life-Limited Parts12/19/2023
A en Mandatory DECU - Drift of P0 Sensors in a Batch of 23 DECUs03/18/2010
A en Mandatory Alert N2 Sensor Harness. Check of Potentially Non-Compliant Batch of N2 Sensor Harnesses10/09/2012
en Mandatory Alert Power Turbine Wheel Assembly - Dampers Check02/09/2018
Up 2 en Mandatory Alert Replacement of the Injection Manifolds05/25/1999
Up 3 en Mandatory Alert Replacement of the Injection Manifolds07/21/2000
Up 6 en Mandatory Alert Replacement of the Injection Manifolds08/14/2004
Up 3 en Mandatory Alert Replacement of the Fuel Injection Manifolds05/25/1999
Up 4 en Mandatory Alert Replacement of the Fuel Injection Manifolds10/20/2000
Up 7 en Mandatory Alert Replacement of the Fuel Injection Manifolds08/14/2004
en Mandatory Alert Check of Correct Position of Adjusted FCU Fuel Filter05/11/2005
en Mandatory Alert Fuel Control Unit - Check and Replacement of the Constant Delta P Device Diaphragm08/03/2005
en Mandatory Alert Test of Free Turbine (FT) Overspeed Protection System03/24/2005
Up 1 en Mandatory Alert Lubrication Unit - Replacement of Check Valve Piston O-Ring04/03/2006
en Mandatory Alert Lubrication Unit - Replacement of Check Valve Piston O-Ring06/21/2005
Up 1 en Mandatory Alert Lubrication Unit - Replacement of Check Valve Piston O-Ring04/03/2006
en Mandatory Alert Inspection of the Magnetic Heads of the Electrical Magnetic Plug Assemblies11/27/2017
en Mandatory Alert Replacement of the Magnetic Heads of the Electrical Magnetic Plug Assemblies11/20/2017
Service Letters
NameRevisionLangSubjectDate
en Arrius 2 B1 and 2 B1A - Reduction of Accumulated Operating Time of 2 Minutes 30 Seconds OEI Rating07/30/2002
en Arrius 2 K1 Reduction of Accumulated Operating Time of 2 Minutes 30 Seconds OEI Rating07/30/2002
en Alert ARRIEL 1 E2 - Engine Power Ratings Availability at High Altitude10/23/2006
Technical Instructions
NameRevisionLangSubjectDate
E en Vibration Check of the 41-Tooth Gear with Simplified System (B&K 3658-A Type) for Check in the Test Field (Engine)01/31/2014
en Vibration Check of the 41-Tooth Gear for Check on Test Bench10/30/2013
E en Vibration Check of the 41-Tooth Gear with Simplified System (B&K 3658-B Type) for Check in the Test Field (Engine)01/31/2014
en Vibration Check of the 41-Tooth Gear for Check on Test Bench10/30/2013
Miscellaneous
NameRevisionLangSubjectDate
en Alert Fax: Arrius 2F - Immediate Grounding04/26/2005
A en Note Technique: List of Serial Numbers Impacted by SB 272 73 287210/18/2019
en Arrius 2 B1: Service Bulletin Index12/11/2020