R44 Service Bulletins

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R44 SB-89
Supersedes R44 Safety Alert dated 23 February 2015
Main Rotor Blade Modification
Ref. Main Rotor Blade Modification Tutorial Video
Ref. MSDSs and Technical Data Sheets
30 MAR 2015
R44 SB-88 Landing Gear Attach Nuts 08 DEC 2014
R44 SB-87 B771-2 (Reusable) Air Filters 14 OCT 2014
R44 SB-86 Rotor RPM Sender Magnets 03 JUL 2013
R44 SB-85 C771-1 Air Filter Deterioration 31 AUG 2012
R44 SB-84 Fuel Cap Decal 30 MAY 2012
R44 SB-83 Tail Rotor Blade Fatigue Cracks 30 MAY 2012
R44 SB-82 Rotor Brake Switch 21 FEB 2012
R44 SB-81 Hydraulic Servos 21 FEB 2012
R44 SB-80 Pop-Out Float Cylinder Valve 07 SEP 2011
R44 SB-79
Supersedes R44 SL-33
C188-3 Sprag Clutches 20 DEC 2010
R44 SB-78B
Ref. R44 Fuel Bladder Rebate Extended
Bladder Fuel Tank Retrofit 28 SEP 2012
R44 SB-77 Clutch Actuator Fuse Holder Wiring 26 MAY 2010
R44 SB-76 Air Conditioning Installation Upgrades 30 APR 2010
R44 SB-75 Door Lower Hinge Pins 30 APR 2010
R44 SB-74 MRGB Input Yoke Retaining Nut Torque 30 APR 2010
R44 SB-73 Battery Relay Bypass Circuit Fuse 30 APR 2010
R44 SB-72A
Supersedes R44 SL-24
Ref. AD 2014-23-16
Main Rotor Blade Bond Inspection
Ref. Tap Test Tutorial Video
Ref. Maintenance Record Appendix for AD 2014-23-16
AMOC for AD 2014-23-16
19 JUL 2012
R44 SB-71
Supersedes R44 SB-58A
R44 II Throttle Link 25 MAR 2009
R44 SB-70 Carbon Monoxide (CO) Detector Retrofit 25 MAR 2009
R44 SB-69 Gascolator Assembly 25 MAR 2009
R44 SB-68
Supersedes R44 SB-31
Rigid Fuel Line Replacement 25 MAR 2009
R44 SB-67 R44 II Fuel Hose Supports 06 NOV 2008
R44 SB-66
Supersedes R44 SB-45
D202-2 Bracket Replacement 18 MAR 2008
R44 SB-65 Air Conditioning Duct Wiring 22 FEB 2008
R44 SB-64 Removable Collective Spring Pin 22 FEB 2008
R44 SB-63
Ref. AD 2010-24-03
Pedal Support Safety Tabs 22 FEB 2008
R44 SB-62 R44 II Throttle Linkage 19 DEC 2007
R44 SB-61 Main Rotor Blade Erosion 29 MAR 2007
R44 SB-60 C771-1 Air Filters with Orange Rubber 15 SEP 2006
R44 SB-59 C046-18 Frame Tube Clamp 09 AUG 2006
R44 SB-58A
Superseded by R44 SB-71
R44 II Throttle Link 01 SEP 2006
R44 SB-57 KI-176 R44 Tailpipe Extension Kit 29 MAR 2006
R44 SB-56
Ref. AD 2007-11-01
Seat Belt Buckle Assemblies 29 MAR 2006
R44 SB-55
Supersedes R44 SB-54
R44 II Fuel Control Reorientation 20 JUL 2005
R44 SB-54
Superseded by R44 SB-55
R44 II Fuel Control Venturi 25 APR 2005
R44 SB-53 C046-18 Frame Tube 27 MAY 2004
R44 SB-52 Comm Antenna Tips 27 MAY 2004
R44 SB-51 NAS6605-31 Bolts 24 NOV 2003
R44 SB-50 R44 II Oil Line Clamp 11 SEP 2003
R44 SB-49 Engine Alternate Air Intake 11 SEP 2003
R44 SB-48 R44 II Fuel Control Safety Wire 11 SEP 2003
R44 SB-47 R44 II Fuel Control Inlet Fitting 20 JUN 2003
R44 SB-46 D318-1 Muffler and Tailpipe Shield Installation 15 NOV 2002
R44 SB-45
Superseded by R44 SB-66
D202-2 Bracket Replacement 15 NOV 2002
R44 SB-44 Hydraulic Pump Lines and Fittings 01 AUG 2001
R44 SB-43A
Ref. AD 2003-04-05
Tail Rotor Pitch Control Bearings 10 JUN 2002
R44 SB-42
Cancelled 15 OCT 2004
C181-3 Lower Clutch Actuator Bearing Lubrication 01 AUG 2001
R44 SB-41A Tail Rotor Rigging 10 JUN 2002
R44 SB-40 Emergency Pop-Out Float Pressure Cylinder Valve 12 SEP 2000
R44 SB-39
Ref. AD 2001-20-18
Horizontal to Vertical Stabilizer Attach Channels 12 SEP 2000
R44 SB-38 Hydraulic Reservoir Sequence Valve Inspection 03 MAR 2000
R44 SB-37 Aft C121-25 Push-Pull Tube Contact with Mast Fairing Rib 17 JAN 2000
R44 SB-36
Ref. AD 99-07-18 &
AD 00-08-04
C188-3 Sprag Clutch 05 NOV 1999
R44 SB-35
Ref. AD 99-17-17
C908-1 Yoke Replacement 26 JUL 1999
R44 SB-34 Tail Rotor Gearbox Output Shaft Bearing Preload 21 JUN 1999
R44 SB-33 C051-1 or -2 Belt Tension Actuator 03 MAY 1999
R44 SB-32
Ref. AD 99-07-18 and
AD 00-08-04
C188-3 Sprag Clutch 22 MAR 1999
R44 SB-31
Superseded by R44 SB-68
Ref. AD 00-07-03
Wire Harness Contact with C726-2 Fuel Line Assembly 28 OCT 1998
R44 SB-30 Auxiliary Fuel Tank Drain Tube Shutoff Clamp 28 OCT 1998
R44 SB-29
Ref. AD 99-03-05 &
AD 2002-23-06
Replacement of Crankshaft Gear Retaining Bolt 09 JUL 1998
R44 SB-28A
Ref. AD 98-12-19
R44 Main Rotor Blade Replacement 27 OCT 1998
R44 SB-27B
Ref. AD 98-22-16
Main Rotor Blade Inspection 18 JUN 1998
R44 SB-26
Ref. AD 98-04-12
Lateral Cyclic Trim Assembly 31 JAN 1998
R44 SB-25
Ref. AD 98-05-10
Oil Line Elbows 01 OCT 1997
R44 SB-24 Removal of Paint from Tail Rotor Gearbox Attachment Surfaces 01 OCT 1997
R44 SB-23
Ref. AD 97-16-02
Replacement of C018-1 Clutch Assembly 30 MAY 1997
R44 SB-22 Tail Rotor Guard 30 MAY 1997
R44 SB-21
Ref. AD 97-16-02
Belt Tension Actuator Switches 18 APR 1997
R44 SB-20 C315 Collective Support Weldment 16 APR 1997
R44 SB-19 Lateral Cyclic Trim Assembly Spring Shaft Wear 16 APR 1997
R44 SB-18 Pilot's Heater Outlet Air Supply Hose 16 APR 1997
R44 SB-17
Ref. AD 98-21-36 superseded by AD 99-23-01
Pilot's Grip Assembly 18 DEC 1996
R44 SB-16 Replacement of C309-1 Panel Assembly with V-belt Restraint 22 OCT 1996
R44 SB-15
Ref. AD 96-18-22
Main Rotor Gearbox Ring Gear Bolts 02 AUG 1996
R44 SB-14
Supersedes R44 SB-02, R44 SB-03, & R44 SB-09
Replacement of C007-3 or C007-4 Shaft Assembly and D174-1 Fanwheel 26 APR 1996
R44 SB-13 Collective Spring Assembly and Spring Assembly Support Replacement 26 DEC 1995
R44 SB-12 Cyclic Damper Replacement 11 SEP 1995
R44 SB-11 Replacement of CAT Gage and Relocation of Probe 11 SEP 1995
R44 SB-10 Upper and Lower Swashplate Fork and Arm Linkage Assemblies 11 SEP 1995
R44 SB-09
Superseded by R44 SB-14
Fan Nut Torque 11 SEP 1995
R44 SB-08 Gascolator Drain Valve Torque 08 JUN 1995
R44 SB-07A Low RPM Warning Unit Adjustment 08 JUN 1995
R44 SB-06
Ref. AD 95-11-10
Placard to Prohibit Pushovers 23 MAY 1995
R44 SB-05 Main Rotor Droop Stops and Teeter Stops 26 APR 1995
R44 SB-04
Ref. AD 95-09-07
Replacement of Guides for C121-7 Push-Pull Tubes 24 JAN 1995
R44 SB-03
Superseded by R44 SB-14
Replacement of C007-3 Shaft Assembly and/or D174-1 Fanwheel 18 NOV 1994
R44 SB-02
Superseded by R44 SB-14
Inspection of Cooling Fan 24 OCT 1994
R44 SB-01A Required Modification of Cyclic Trim Motors 26 MAY 1994