R44 Service Bulletins
| NUMBER | SUBJECT | DATE |
|---|---|---|
| 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 |
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 2011-12-10 AMOC for AD 2011-12-10 |
Main Rotor Blade Bond Inspection Ref. Tap Test Tutorial Video Ref. Maintenance Record Appendix for AD 2011-12-10 | 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| R44 SB-58A Superseded by R44 SB-71 |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| R44 SB-54 Superseded by R44 SB-55 |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 |