Service Bulletins| Name | Revision | Lang | Subject | Date |
|---|
| SB 55B20-1 |
F |
en |
Inspection of Tail Cone Ring Assembly, Housing and Pylon Lower Ring Assembly | 04/25/1967 |
| SB 55B35-3 |
B |
en |
Inspection of Main Gear Box Assembly, Upper Housing, Main Rotor Shaft | 10/01/1974 |
| SB 55B40-5 |
A |
en |
Replacement of Azimuth Control Rod Assembly (S14-40-2105-1) | 10/15/1969 |
| SB 55B40-6 |
|
en |
Inspection of Main Gear Box, Primary Servo Mechanism Support | 10/01/1971 |
| SB 58B10-10 |
3 |
en |
Alert Inspection of Main Rotor Head, Stationary Star | 09/30/1977 |
| SB 58B10-19 |
|
en |
Alert Rotors - Inspection of Main Rotor Head - Star Assembly Retainer Bolts | 05/31/1985 |
| SB 58B35-17 |
E |
en |
Inspection of Transmission System, Tail Gear Box Assembly and Pylon Fitting Assembly | 06/05/1985 |
| SB 58B35-26 |
|
en |
Transmission System - Intermediate Gear Box - Input Bevel Pinion and Output Bevel Gear; Overhaul, Retirement, Rework and Replacement Requirement | 11/29/1984 |
| SB 58B35-31 |
A |
en |
Alert Powerplant - Engine Drive Shaft Assembly - Inspection for Loose Balance Weights | 02/17/1993 |
| SB 58B35-32 |
|
en |
Alert Transmission Systems - Main Gear Box Assembly - Ring Gear - Establishment of 2500 Hour Retirement Time and Serialization | 07/06/1993 |
| SB 61B10-14 |
|
en |
Hardness Test of Rotary Wing Head Shaft Nut | 11/03/1969 |
| SB 61B10-48 |
|
en |
Alert Rotors - Main Rotor Spindle Assemblies - Repetitive Ultrasonic Inspection of; Disassembly of Sleeve and Spindle Assembly - One-Time Visual Inspection of Spindle for Corrosion | 01/18/1991 |
| SB 61B15-6 |
P |
en |
BIM (Main Rotor Blades (S6115-20501, S6115-20601, S6117-Z0101, S6188-15001 and 61170-20201 Series) | 12/03/1981 |
| SB 61B15-20 |
D |
en |
Incorporation of Rotors, Rotary Wing Blade In-Cockpit BIM | 11/09/1977 |
| SB 61B15-29 |
A |
en |
Alert Blades - One-Time Inspection of Main Rotor Blades - Pocket Bond Integrity | 05/09/1997 |
| SB 61B20-33 |
|
en |
Alert Pylon- Inspection/Replacement of Upper and Lower Hinge Web Fittings | 09/03/1999 |
| SB 61B30-15 |
A |
en |
Alert Engine System - Engine Chip Detector System - Installation of | 10/20/2003 |
| SB 61B35-67 |
B |
en |
Alert Rotors - Main Gear Box Input Freewheel Units (IFWU) - Establishment of Time Between Overhaul (TBO) Limit for Repetitive External Lift (REL) and Non-Repetitive External Lift (Non-Rel) Operations | 08/11/2003 |
| SB 61B35-69 |
|
en |
Alert Rotors - Main Gear Box - Main Rotor Shaft - Establishment of New Retirement Time for Main Rotor Shafts (MRS) used in Repetitive External Lift (REL) and Non-Repetitive External Lift (Non-REL) Operations | 04/19/2004 |
| SB 61B40-11 |
|
en |
Alert Flight Controls - One-Time Inspection of Mixer Unit Component Log Card for Arm Assembly (S6140-62614-009) and Verification of the Component Life Limit | 03/02/2020 |
| SB 64B10-4 |
A |
en |
Alert Rotors - Inspection of Main Rotor Head, Torque Tube Inner Bracket Assembly | 07/09/1985 |
| SB 64B15-4 |
C |
en |
BIM Main Rotor Blades (6415-20001 and 6415-20201 Series) | 01/29/1992 |
| SB 64B15-8 |
A |
en |
Alert Main Rotor Blades, Inspection of Spar Tip End for Cracks | 10/16/1984 |
| SB 64B15-8 |
B |
en |
Alert Main Rotor Blades, Inspection of Spar Tip End for Cracks | 12/14/1989 |
| SB 70-04-17 |
|
en |
Alert Powerplant Systems - Engine Systems - One Time Inspection of Power Turbine Shaft/Torque Reference Tube Magnetic Insert Braze | 02/28/2024 |
| SB 70-06-28 |
A |
en |
Alert Drive System - Tail Rotor Gearbox (TGB) - Output Shaft - Initial Ultrasonic Test (UT) Inspection of | 05/21/2009 |
| SB 70-06-29 |
A |
en |
Alert Drive System - S-70/H-60 Intermediate Gearbox (IGB) - One Time Borescope Inspection of | 10/11/2011 |
| SB 76-006 |
A |
en |
Indicating/Recording Systems - Integrated Instrument Display System (IIDS) - Software Update for Display Unit (DU) (76450-01098-101) | 08/23/2018 |
| SB 76-017 |
|
en |
Navigation - Global Positioning System (GPS) - One-Time Software Upgrade to Part Number (P/N) C17149RA01 for GPS TopStar 200 LPV-2 | 05/11/2021 |
| SB 76-24-7 |
A |
en |
Alert Electrical Power - Rewiring of DC Power System - DC Junction Box and Ground Terminations | 06/29/1982 |
| SB 76-24-8 |
|
en |
Alert Electrical Power - Inspection or Modification of DC Power System - Ground Connection | 01/30/1987 |
| SB 76-24-14 |
A |
en |
Alert Electrical Power - Modification of AC Power System - Dual Inverter Wiring | 10/09/2003 |
| SB 76-31-3 |
B |
en |
Alert Indicating/Recording Systems - Remote Data Acquisition Unit (RDAU) One-Time Software Update | 06/26/2018 |
| SB 76-31-4 |
A |
en |
Alert Indicating/Recording Systems - Remote Data Acquisition Unit (RDAU) - One-Time Software Update | 05/30/2018 |
| SB 76-31-5 |
|
en |
Alert Indicating/Recording Systems - Remote Data Acquisition Unit (RDAU) - One Time Software Update | 07/31/2018 |
| SB 76-32-10 |
A |
en |
Alert Landing Gear - One-Time Inspection of Main Landing Gear Positioning Rod and Lower Drag Brace Rod End Assemblies | 12/17/1985 |
| SB 76-32-27 |
|
en |
Alert Landing Gear - Inspection of Brake Assembly - Rotating Disc | 04/30/2002 |
| SB 76-32-28 |
|
en |
Alert Landing Gear - Inspection of Brake Assembly - Rotating Disc | 05/17/2002 |
| SB 76-32-30 |
|
en |
Alert Landing Gear - One-Time Inspection of Emergency Flotation System - Flotation Harness Connectors | 04/08/2009 |
| SB 76-34-6 |
A |
en |
Alert Navigation - LITEF Altitude and Heading Reference System (AHRS) - Removal of Flight Restriction in Areas of High Intensity Radiated Field (HIRF) | 09/12/1996 |
| SB 76-34-11 |
|
en |
Alert Navigation - One-Time Inspection of LCR-100 Attitude, Heading, and Reference System (AHRS) Units | 05/17/2010 |
| SB 76-52-10 |
A |
en |
Alert Doors - Temporary Removal of Left and Right Passenger Doors - Electrical Door Locking Actuator | 08/27/1987 |
| SB 76-53-25 |
|
en |
Alert Fuselage - Engine Compartment Center Firewall - Inspection and Modification of Forward Section Center Firewall | 09/26/1984 |
| SB 76-55-12 |
|
en |
Alert Stabilizers - Reinforcement of Vertical Stabilizer - Forward Spar Station 458 | 06/06/1986 |
| SB 76-55-16 |
|
en |
Alert Stabilizers - One-Time and Recurring Inspection of Vertical Stabilizer - Tail Gear Box Forward Fairings | 05/12/1999 |
| SB 76-65-13 |
A |
en |
Alert Main Rotor Spindle Assembly - Inspection/Replacement and Installation of Bearing Inner Race Retainers | 04/24/1980 |
| SB 76-65-15 |
B |
en |
Rotors - Main Rotor Spindle Assemblies - Inspection of Elastomeric Bearings for Bonding Separations - Replacement of Bearing Inner Race Ty-Rap Retainers | 07/18/1988 |
| SB 76-65-35 |
A |
en |
Alert Rotors - Tail Rotor Blade - Inspection of Spar Elliptical Centering Plug and Installation of Retaining Pad | 02/29/1984 |
| SB 76-65-47 |
|
en |
Alert Rotors - One-Time Inspection and Replacement of Swashplate Assembly - Uniball Bearing Retainer Bolts | 07/31/1998 |
| SB 76-65-50 |
|
en |
Alert Rotors - Main Rotor Blade - Root End Pocket Inspection | 05/25/2000 |
| SB 76-65-55 |
A |
en |
Alert Rotors - Main Rotor Blade - Lightning Strike Removal from Service | 07/25/2002 |
| SB 76-65-62 |
|
en |
Main Rotor Assembly - Lower Bifilar Support - One-Time Visual Inspection of | 12/14/2004 |
| SB 76-65-67 |
A |
en |
Alert Rotors - Spindle Assemblies - One-Time Non-Destructive Inspection (NDI) of Spindle/Cuff Assembly and Application of White Paint to Enhance Existing Inspection Procedure | 07/18/2012 |
| SB 76-66-8 |
A |
en |
Powertrain - Rotor Brake - Addition of Shield Assemblies | 09/30/1981 |
| SB 76-66-10 |
B |
en |
Powertrain - Rotor Brake System - Installation of Warning Relay | 11/25/1981 |
| SB 76-66-14 |
A |
en |
Powertrain - Inspection of Main Gear Box - No. 1 and No. 2 Input Bevel Pinion Housing Assemblies | 12/11/1981 |
| SB 76-66-16 |
B |
en |
Alert Powertrain - Inspection of Main Gear Box Assembly - Shaft and Spur Pinion | 10/20/1982 |
| SB 76-66-18 |
A |
en |
Alert Powertrain - Tail Gear Box - Pitch Change Shaft Assembly - Check for Axial Play | 03/28/1984 |
| SB 76-66-20 |
|
en |
Alert Powertrain Tail Drive Shaft Bearing Support Assembly - Inspection of Bearing | 07/25/1985 |
| SB 76-66-31 |
B |
en |
Alert Powertrain - Main Gear Box - One-Time and Repetitive Non Destructive Inspection (NDI) of Main Rotor Shaft Assembly | 11/07/2000 |
| SB 76-66-32 |
A |
en |
Alert Powertrain - Main Gear Box - Removal from Service and Repetitive Non Destructive Inspection (NDI) Certain Serial Number Main Rotor Shafts | 01/17/2001 |
| SB 76-66-36 |
|
en |
Alert Powertrain - One-Time Visual Inspect of Main Gear Box - Rotor Brake Disc (RBD) - Identification of Manufacturer | 11/12/2002 |
| SB 76-66-37 |
|
en |
Alert Powertrain - Main Gear Box - Rotor Brake Disc (RBD) - Removal from Service and Interim Instructions | 01/31/2003 |
| SB 76-66-45 |
A |
en |
Alert Powertrain - Main Gear Box (MGB) - Inspection of Main Rotor Shaft Assembly - One-Time Ultrasonic (UT) | 02/07/2007 |
| SB 76-66-46 |
|
en |
Alert Powertrain - Main Gear Box (MGB) - Inspection of Main Rotor Shaft Assembly - One-Time Ultrasonic (UT) | 02/07/2007 |
| SB 76-66-48 |
B |
en |
Alert Powertrain - Main GearBox - One-Time Modification of Electric RotorBrake (ERB) | 07/08/2009 |
| SB 76-66-50 |
|
en |
Alert Powertrain - Main Gear Box- One Time Inspection of Main Gear Box (MGB) Lower Housing | 01/14/2013 |
| SB 76-66-52 |
|
en |
Alert Powertrain - Tail Drive Shaft - One-Time Inspection and Torque Verification of Tail Drive Shaft (TDS) Flange Bolt | 04/01/2014 |
| SB 76-67-22 |
A |
en |
Alert Flight Control - Inspection of Yaw Control Rod Assembly | 07/07/1986 |
| SB 76-71-7 |
|
en |
Alert Powerplant - Replacement of Demountable Power Package - Fuselage Mounted Engine Containment Installation - Installation of Allison External Energy Absorbing Ring | 11/09/1984 |
| SB 76-73-8 |
A |
en |
Alert Engine and Fuel Control - 2S1 and 2S2 Engine Digital Engine Control System Collective Position Transducer (CPT) - One-Time Inspection and Differential Voltage Test of CPT | 12/04/2015 |
| SB 76-76-01 |
A |
en |
Alert Engine Controls - Engine Control Quadrant Assembly - One-Time Incorporation of Product Improvement to Replace Engine Control Lever (ECL) Stop and Trigger Assemblies | 05/18/2011 |
| SB 92-20-001 |
|
en |
Alert Standard Practices - Electrical/AFCS/ECS/HUMS Harnesses - To Provide Clearance Improvements on the Helicopter Upper Deck - One-Time Installation of Clamps | 10/27/2005 |
| SB 92-25-026 |
|
en |
Alert Equipment Furnishings - Side Facing Utility Seat - One Time Inspection of Side Facing Utility Seat (MBCS12410AA001) and Oberver Seat (MBCS12200, and MBCS7301-2) and Repair with New Tube Assembly if Necessary | 03/05/2020 |
| SB 92-26-004 |
|
en |
Alert Fire Protection - Engine and APU Fire Extinguishing Lines - Modification of No. 1 Engine Forward Firewall Center Discharge Tube | 06/04/2012 |
| SB 92-26-005 |
A |
en |
Alert Fire Protection - Inertia Switch - One-Time Modification of Fire Bottle Inertia Switch to Disable Automatic Discharge of Fire Bottles | 06/27/2014 |
| SB 92-32-001 |
|
en |
Alert Landing Gear - Landing Gear Retract Actuators - One-Time Replacement of Landing Gear Retract Actuator Locking Key | 05/02/2008 |
| SB 92-32-004 |
|
en |
Alert Landing Gear - Nose Landing Gear (NLG) Retract Actuator - One-Time Inspection of NLG Actuator Fitting and Implementation of a Recurring Inspection | 01/30/2015 |
| SB 92-32-008 |
|
en |
Alert Landing Gear - Landing Gear - One-Time Inspection of Landing Gear for Non- Conforming Threaded Components | 01/21/2020 |
| SB 92-53-001 |
|
en |
Alert Fuselage - Tail Pylon - Perform a One-Time Inspection for Cracks | 06/23/2008 |
| SB 92-53-004 |
B |
en |
Alert Fuselage - Tail Rotor Pylon, One-Time Replacement of; and Joining-Tailcone - Installation of Doubler to Reinforce Aft Shear Deck Web Assembly | 06/21/2011 |
| SB 92-62-009 |
|
en |
Alert Rotors - Main Rotor (MR) Swashplate Assembly - One-Time Visual Inspection of MR Stationary Swashplate Assembly for Cracks | 02/06/2019 |
| SB 92-62-010 |
|
en |
Alert Rotors - Main Rotor (MR) Swahplate Assembly - One-Time Inspection of MR Stationary Swashplate Assembly to Initate a 50-Hout Recurring Inspection | 01/26/2022 |
| SB 92-63-003 |
|
en |
Alert Rotor Drives - Main Module Assembly - Main Transmission Assembly (MTA) - Inspection of the Eight Mounting Bolts | 02/01/2006 |
| SB 92-63-014 |
A |
en |
Alert Rotor Drives - Main Module Assembly - Main Gearbox (MGB) Lube System Filter Components - One-Time Replacement of Mounting Studs | 03/20/2009 |
| SB 92-63-022 |
A |
en |
Alert Rotor Drives - Main Module Assembly - Main Gearbox (MGB) Lube System Filter Components - One-Time Modification of Filter Bowl Assembly | 12/18/2009 |
| SB 92-63-025 |
A |
en |
Alert Rotor Drives - Main Module Assembly - Main Gearbox Assembly - One-Time Non-Destructive Inspection (NDI) at Mounting Foot Ribs for Cracks | 05/12/2011 |
| SB 92-63-032 |
|
en |
Alert Rotor Drives - Main Gear Box - Main Module Assembly - Perform a One-Time Enhanced Visual Inspection for Leakage and Implement a Recurring Visual Inspection for Leakage | 12/22/2011 |
| SB 92-63-034 |
|
en |
Alert Rotor Drives - Main Gear Box - Main Module Assembly - Perform One-Time Eddy Current Inspection of Main Module Assembly for Cracks | 03/08/2012 |
| SB 92-64-002 |
|
en |
Alert Tail Rotor - Perform a One-Time Borescope Inspection of Tail Rotor Pitch Change Shaft and Bearing Assembly | 08/03/2007 |
| SB 92-67-006 |
A |
en |
Alert Flight Controls - Pushrods - One-Time Inspection of Main Rotor and Tail Rotor Servo Pushrods | 02/19/2016 |
| SB B-299.1 |
1 |
en |
Alert Drive Train - Tail Rotor Drive Shaft Splined Fittings - Perform a One-Time Inspection and Implement a Recurring Inspection for Wear | 02/24/2012 |
| SB B-307 |
|
en |
Alert Power Train - Lower Coupling Drive Shaft - One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly | 12/18/2014 |
| SB C1B-036.1 |
1 |
en |
Alert Drive Train - Tail Rotor Drive Shaft Splined Fittings - Perform a One-Time Inspection and Implement a Recurring Inspection for Wear | 02/24/2012 |
| SB C1B-043 |
|
en |
Alert Power Train - Lower Coupling Drive Shaft - One-Time Inspection of Lower Coupling Drive Shaft and Shaft Assembly | 12/18/2014 |
| SB DB-041.1 |
1 |
en |
Alert Drive Train - Tail Rotor Drive Shaft Splined Fittings - Perform a One-Time Inspection and Implement a Recurring Inspection for Wear | 02/24/2012 |
