R22 Service Letters

NUMBER SUBJECT DATE
R22 SL-60 Kannad ELT Service Bulletin
Ref. Kannad ELT Service Bulletin S1820514-25-04		 19 JUL 2012
R22 SL-59 MRGB Oil Level Fluctuation 07 SEP 2011
R22 SL-58 Cracked MS21042L-series Nuts 18 AUG 2011
R22 SL-57 Alternator V-Belts 22 FEB 2008
R22 SL-56B A016-4, C016-2, and C016-5 Main Rotor Blade Bond Maintenance
Additional Information Regarding Main Rotor Blade Skin Debonding		 30 APR 2010
R22 SL-54
Ref. AD 2004-06-52		 Revised Main Rotor Blade Retirement Life 17 JUN 2004
R22 SL-53 Visual Inspection of Main Rotor Blade Root Area 21 NOV 2001
R22 SL-52
Supersedes SL-49		 Master Battery Relay Upgrade 01 AUG 2001
R22 SL-51 Tachometer Contact Assembly in Magneto 14 APR 1999
R22 SL-50 Mixture Control Cable Clamp 02 OCT 1998
R22 SL-49
Superseded by R22 SL-52		 Master Battery Relay 08 SEP 1998
R22 SL-48 A184 Upper Clutch Actuator Bearing 04 MAR 1997
R22 SL-47 "GOV OFF" (Governor Off) Caution Light 10 APR 1996
R22 SL-46 Main Rotor and Tail Rotor Gearbox Chip Detectors 23 SEP 1994
R22 SL-45
Ref. AD 94-17-07 and
Ref. R22 SB-74		 Tail Rotor Gearbox Shaft Keys − Terminating Action for AD 94-17-07 23 SEP 1994
R22 SL-44
Superseded by R22 SB-105		 Replacement of Fuel Shut-Off Guard 20 OCT 1992
R22 SL-43 Additional Caution Decal for Baggage Compartments 08 OCT 1992
R22 SL-42 Replacement of Inlet Ducts 18 JUN 1992
R22 SL-41 False Low RPM Warning Occurring During Radio Transmissions 13 MAR 1992
R22 SL-40 Tail Rotor Visual Warning Guard & Danger Decals 28 AUG 1991
R22 SL-39
Supersedes R22 SL-27		 Installation of New A190-2 Vee Belts 19 APR 1991
R22 SL-38 Black & White Paint Scheme for Tail Rotor Blades 22 MAR 1991
R22 SL-37 Precision Airmotive Service Bulletins MSA-1 & MSA-2 NOV 1990
R22 SL-36 Alignment of Fan Shaft Bearing Housing 05 OCT 1990
R22 SL-35 Alignment of Vee Belt Sheaves 06 JUN 1990
R22 SL-34 Excessive Oil Leakage from Tail Rotor Gearbox Breather Tube 15 SEP 1989
R22 SL-33 Aeroquip Corporation Bulletin No. 001 18 MAY 1989
R22 SL-32 Overruning Sprag Clutch Bearings 07 NOV 1988
R22 SL-31 A184-1 Clutch Bearing 12 APR 1988
R22 SL-30 Magneto Switch Wiring 16 NOV 1987
R22 SL-29 Proper Use of Starter Switch to Avoid Breaking Starter 14 SEP 1987
R22 SL-28 Avco Lycoming Service Bulletin No. 477 17 DEC 1986
R22 SL-27
Superseded by R22 SL-39		 New A190-2 Banded Vee Belt Installation 01 OCT 1986
R22 SL-26 Battery Terminal Misalignment 15 APR 1986
R22 SL-25 Modification of A437 Jackshaft Brace Tab 15 JAN 1985
R22 SL-24 Removal of Clutch Yokes Before Shipment 06 NOV 1984
R22 SL-23A Special Caution When Installing Vee Belts or Other Driveline Components 20 JUN 1984
R22 SL-22 Replacement Bearings for Tail Rotor Teeter Hinge, and, Severe Hazard When Using Any Non-Approved Bearings 17 FEB 1984
R22 SL-21A Main Rotor Blade Sealant and Filler Cracking 31 MAY 2002
R22 SL-20A Vee Belt Installation 20 JUN 1984
R22 SL-19 Installation of Guard for Removable Cyclic Stick 18 OCT 1982
R22 SL-18 Installation of Mixture Control 07 JUN 1982
R22 SL-17 Removal of Cabin Heater Muffler Shroud in Warm Weather to Extend Muffler Service Life 17 MAY 1982
R22 SL-16 Installation of the A911-1 Cabin Heater Scoop 19 MAY 1982
R22 SL-15 Visual Inspection of Main Rotor Blade Root Area 23 SEP 1981
R22 SL-14 Inspection of A197 Tail Rotor Drive Shafts 16 SEP 1981
R22 SL-13 Loose Horizontal Firewall to Steel Tube Frame Attach Bolts 10 SEP 1981
R22 SL-12 Premature Wear of A190-1 Vee Belts 19 AUG 1981
R22 SL-11 Loose Upper Cylinder Base Nuts 18 AUG 1981
R22 SL-10 Engine Idle Speed Limitations 11 AUG 1981
R22 SL-09 Installation of A214-3 Safety Washers 27 JUL 1981
R22 SL-08 Action Required When MR Chip Light Comes On 03 OCT 1980
R22 SL-07 Inspection of Long Tail Rotor Drive Shaft 27 SEP 1980
R22 SL-06 Inspection of A193-2 Flex Plate 24 SEP 1980
R22 SL-05 Installation of Nickel Plated Washers in the Forward and Intermediate Flex Plates 29 OCT 1980
R22 SL-04 Battery Ground Strap 22 JUL 1980
R22 SL-03 Tail Rotor Control Pedals 22 JUL 1980
R22 SL-02 Tail Rotor Control Push-Pull Tube A121-13 22 JUL 1980
R22 SL-01 Cabin Heat Blower Assembly A643 22 JUL 1980

 

R22 Special Service Letters to Selected Owners

NUMBER SUBJECT DATE
N/A Modification of S723-1 Oil Filter Adapter to Facilitate Oil Filter Removal 11 JAN 2002
N/A SB-10 dated 27 April 1981 and SB-44 dated 05 February 2985
CANCELLED		 12 SEP 2000
N/A Elastomeric Tail Rotor Teeter Hinge Bearings 12 MAY 1997
N/A Carburetor Floats 22 JUL 1992
N/A Replacement of Low RPM Circuit 03 JUN 1992
N/A Installation of New Governor Toggle Switch 22 OCT 1990
N/A Latches on Carb Air Box Cover 10 OCT 1988
N/A Carburetor Air Inlet Duct 15 JAN 1988
N/A Float Gear Installation and Removal 07 JUL 1987
N/A Modification of MAP Limit Charts A654-64 Decal for Beta Model 06 DEC 1986
N/A Modification of A752-2 Headset 22 MAY 1985

 

 

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