ROBINSON HELICOPTER
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Revised: 26 May 2010
 
  R22 Service Bulletin Index 

Bulletin #

DATE

SUBJECT

A/C AFFECTED
1 28 Dec 79 Main Rotor Blade Inspection S/Ns 0002-0014 equipped with M.R. Blades S/Ns 0003-0033.
2 4 Mar 80 Main Rotor Blade Inspection S/Ns 0002-0020 equipped with M.R. Blades S/Ns 0003-0043.
3 29 Jul 80 Steel Tube Frame A020-2 S/Ns 0002-0045.
4 28 Oct 80 Inspection of Frame A020-2 S/Ns 0002-0082.
5 6 Oct 80 Possible Installation of Defective Main Rotor Gear Sets S/Ns 0006-0060.
6 26 Jan 81 Inspection of Main Rotor Gearbox Flex Coupling Yoke S/Ns 0002-0095.
7 9 Feb 81 Inspection of Long TR Drive Shaft S/Ns 0002-0099.
8 19 Feb 81 Ice Blockage of Engine Breather Tube S/Ns 0002-0100.
9 4 Mar 81 Additional Inspection of Main Rotor Gearbox Yokes S/Ns 0002-0036, 0038-0061, 0064-0089, 093 and 0095.
10

CANCELLED (09-12-00)

 27 Apr 81 Inspection of A184-1 (Upper) and A181-1 (Lower) Sheave Bearing S/N 0002 and after.
11 4 May 81 Inspection of A192 and A194 Main Rotor Gearbox Yokes S/Ns 0002-0107.
12 26 May 81 Removal of Sharp Edges on the Angular Latch of A628-1 & -2 S/Ns 0002-0153.
13 4 Sept 81 MR Root Fitting Fatigue Failure All R22s.
14 14 Oct 81 Failure of the A041-2 Damper Clip S/Ns 0002-0220.
15 14 Nov 81 Service Life Reduction and Additional Inspection of A016 Main Rotor Blades All R22s.
16 18 Nov 81 Improper Clutch Shaft Plug Installation S/Ns 0002-0226.
17 15 Mar 82 Replacement of Fuel Valve Handle S/Ns 0002-0255.
18 12 Mar 82 Inspection of A020-2 Upper Frame S/Ns 0002-0260 equipped with A020-2 
S/Ns 0002-0287.
19 13 Apr 82 Replacement of A106-4 or -5 Journals and Teeter Hinge Bearings S/Ns 0052, 0125, 0198, 0244-0267.
20 3 May 82 Inspection of Long Tail Rotor Drive Shaft and Damper S/Ns 0002-0290.
21 1 Jun 82 Replacement of Tail Rotor Drive Shaft and Aft Flex Plate S/Ns 0002-0282.
22 24 Jun 82 Inspection for Rubbing A121-7 Push-Pull Tubes S/Ns 0002-0286.
23 27 Aug 82 Inspection of A020-2 Upper Frame S/Ns 0002-0311 equipped with A020-2 
S/Ns 0002-0361.
24

Ref. AD 97-02-14

 23 Oct 82 Low RPM Warning Light Installation S/Ns 0002-0250.
25

Ref. AD 97-02-14

 26 Oct 82 Low RPM Warning Unit Readjustment S/Ns 0002-0307.
26 9 Nov 82 Installation of A960-1 Clamp and A961-1 Strap on A020-2 Upper Frame S/Ns 0002-0311 except those equipped with A020-2 
S/Ns 0400 and on.
27 2 Feb 83 Spring for Cyclic Boot S/Ns 0002-0320.
28 22 Feb 83 Inspection of Lower Actuator Bearing A181-1 S/Ns 0002-0380.
29 1 Mar 83 Clutch Lock Switch S/Ns 0002-0225.
30 12 Apr 83 Check if Low RPM Warning System S/Ns 0002-0332.
31 14 Apr 83 Lower Actuator Bearing A181-1 S/Ns 0196-0341 and rebuilt, O/H, or repaired A/C with new A181 installed Aug 81 thru 
14 Apr 83.
32 7 Jun 83 Actuator Drive Screw Equipped with A051-1 S/Ns 0152-0346.
33 25 Jul 83 Mandatory Replacement of Old Design Rev W (1000 hr) Main Rotor Blades Equipped with Rev W blades 
S/Ns 0810 or prior.
34 24 Aug 83 Clutch Actuator Light Relocation S/Ns 0002-0349.
35 7 Oct 83 V-Belt Installation S/Ns 0002-0379 equipped with A020-2 
S/Ns 0002-0500.
36 11 Nov 83 Inspection of A121-7 Push-Pull Tube and Guide Wear S/Ns 0002-0369.
37A 6 Mar 84 Washer installed on M.R. Pitch Rod S/Ns 0002-0333.
38 17 Feb 84 M.R. Controls Sticking or Binding S/Ns 0002-0393.
39 17 Feb 84 Drilled Head Bolt Installation Lower Frame to Fuselage S/Ns 0002-0383.
40 20 Jun 84 Modification of Fwd. RH Landing Gear Mount Shackle S/Ns 0301 and 0350-0374.
41 20 Jun 84 Mixture Control Safety Spring Assembly Installation S/Ns 0002-0265.
42A 18 Mar 85 Drive System Growl S/Ns 0345-0433 and A/C with clutch sprag replaced May 83-Jul 84.
43

Ref. AD 84-18-04

 24 Aug 84 Inspection and Modification of Main Rotor Gearbox Ring Gear Bolts S/Ns 0002-0433 equipped with A006 
S/Ns 0002-0434.
44

CANCELLED (09-12-00)

 5 Feb 85 Inspection of Lower Actuator Bearing All R22s.
45 10 May 85 Clutch Actuator Overtravel S/Ns 0002-0463.
46 18 Oct 85 Sprag Clutch Replacement A/C affected by SB-42A without new A188-2 installed.
47 13 Jan 86 Inspection of A020-2 Upper Frame S/Ns 0002-0311 except those with A020-2 S/Ns 0400 and on.
48 13 Jan 86 A723 Oil Cooler Lines S/Ns 0002-0500 without sleeves.
49 15 Apr 86 A740-1 Manifold Pressure Line S/Ns 0002-0545.
50 15 Apr 86 Vee Belt Drive S/Ns 0002-0529 without new double banded A190-2 v-belts.
51 2 Jul 86 Main Rotor Elastic Teeter Stops S/Ns 0501-0554 having teeter stops installed with Ty-Raps.
52 2 Jul 86 Oil Cooler Mounting Installation S/Ns 0002-0557.
53 1 Oct 86 Cracks in Lower Vertical Fin Attachment Channels S/Ns 0002-0598.
54 20 Nov 86 Caution Decal for Carburetor Air Temperature Gauge S/Ns 0002-0602, 0604 and 0610.
55 7 Jan 87 R22 Harness Assembly Buckle S/Ns 0436-0603 and having new A628 installed 20 Aug 84 thru 1 Jan 87.
56 20 Jan 87 Stop for Cabin Door Air Vent S/Ns 0002-0622.
57

Ref. AD 87-18-03

 11 May 87 Main Rotor Pitch Link Inspection and Fitting Replacement S/Ns 0580-0644 and R22s O/H repaired at RHC 15 Aug 86 thru 7 May 87 and all A258-1,-2, -4s received from RHC 15 Aug 86 thru 7 May 87 .
58 13 Sept 88 Actuator Bearing S/Ns 0002-0830.
59 7 Nov 88 Main Rotor Spindle Crack Inspection All R22s with over 500 hrs time in service.
60A

Ref. AD 88-26-01

 12 Jan 89 Main Rotor Spindle Rework and Journal Replacement S/Ns 0002-0912 equipped with with A158-1 spindle Rev Q or prior.
61

Ref. AD 90-17-01

 28 Jul 89 Latches on Carburetor Air Box S/Ns 0885-0948 & 0184, 0292, 0403, 0436, 0374, 0603, 0567, 0394, 0617, 0378, 0592, 0473, 0601, 0771, and R22s equipped with latches in place of bolts on carburetor air box cover.
62 10 May 90 Air Duct Chafing Oil Line S/Ns 0002-1392.
63 6 Jun 90 Replacement of Fan Shaft Bearings with A181-4 All R22s.
64 8 Jun 90 Tail Rotor Clip Replacement with  SB-64 Kit (A795-1 Rev and subsequent) S/Ns 0002-1432.
65 20 Dec 90 Cracking of Fanwheel Assembly Hubs S/Ns 1000-1330.
66 19 Apr 91 Vee Belt - Lower Sheave Inspection S/Ns 0002-1170.
67 9 Jan 92 Replacement of Tail Rotor Visual Warning Guard (B312-11) S/Ns 0002-2040.
68

 

 27 Feb 92 Tailcone Skin Doubler for all Tail Rotor Visual S/Ns 0002-2060.
69

Ref. AD 92-06-17

27 Feb 92 Replacement of Suspect NAS1304-16AF Bolts S/Ns 1880-2060 & 2073
70 3 Jun 92 Improved Replacement of Vee Belts S/Ns 0002-1976 and S/Ns 1996-2145.
70A 3 Jun 92 Improved Replacement Vee Belts S/Ns 0002-1976 and S/Ns 1996-2145.
71 18 Jun 92 Inspection of Upper Vee Belt Sheave S/Ns 1447-2096.
72

Ref. AD 94-15-08

 29 Mar 93 Inspection of Main Rotor Blades for Corrosion All R22s with A016-2 thru S/N 7569.
73

Ref. AD 95-06-07

 15 Mar 94 Inspection of A947-1 Fwd Flex Plate All R22s.
74

Ref. AD 95-23-05

 18 Jul 94 Tail Rotor Gearbox Output Shaft Key S/Ns 0002-2180.
75

Ref. AD 95-06-07

 22 Nov 94 Replacement of Fwd Flex Plates All R22s.
76

Ref. AD 95-06-07

 22 Dec 94 Main Rotor Shaft Retaining Nuts S/Ns 0002-2177.
77

Ref. AD 96-09-29

 25 Apr 95 Replacement of Vee Belt Upper Sheave S/Ns 1441-2096.
78 26 Apr 95 Main Rotor Droop Stops and Teeting Stops S/Ns 0002-2519.
78A 27 May 04

revised

 Main Rotor Droop Stops and Teeting Stops S/Ns 0002-2519.
79

Ref. AD 95-11-09

 23 May 95 Placard to Prohibit Pushovers S/Ns 0002-2547.
80 6 Jun 95 Throttle Governor Installation and Low RPM Warning Unit Adjustment A: S/Ns 0002-2554.

B: S/Ns 0002-1759 unless already equipped with governor.
80A

Ref. AD 97-02-14

 8 Jun 95 Throttle Governor Installation and Low RPM Warning Unit Adjustment A: S/Ns 0002-2537.
B: S/Ns 0002-1759.
81 8 June 95 Gascolator Drain Valve Torque S/Ns 0002 thru 2537.
82

Ref. AD 97-25-05

 3 Mar 97 Carburetor Replacement S/Ns 2571 thru 2664.
83

Ref. AD 98-21-09

 4 Mar 97 Upgrade of Fuel Tank Vents All R22 helicopters manufactured prior to 1991
84

Ref. AD 98-21-09

 9 Sept 98 Fuel Tank Vent Upgrade S/Ns 0002-1451 unless factory overhauled 1-91 or later.
85

Ref. AD 99-07-17 & AD 2000-08-09

 22 Mar 99 A188-2 Sprag Clutch S/Ns 0002 thru 2862.
86 3 May 99 A121-3 and A121-7 Push-Pull Tubes rubbing S/Ns 2858 thru 2948.
87 15 Dec 99 Seat Belt Anchor Upgrade S/Ns 0002 thru 1979 unless factory overhauled Nov 1991 or later.
88 12 Sep 00 A203-5 Yoke Replacement S/Ns 0002 thru 2787.
88A

Ref. AD 2000-20-51

 13 Sep 00 A203-5 Yoke Replacement Supersedes SB-88 dated 12 Sep 00.
89 01 Aug 01 A184 Upper Clutch Actuator Bearing Lubrication All R22s.
90 01 Aug 01 Tail Rotor Pitch Control Bearings All R22s.
90A

Ref. AD 2003-04-04

 10 Jun 02 Tail Rotor Pitch Control Bearings See bulletin.
91 03 Nov 03 A437-2 Jackshaft Brace Tabs R22s S/N 0002 thru S/N 3465 except S/Ns 0256, 1087, 1112, 1226, 1475, 1493, 1918, 2051,2219, 2452, 2890, 3087, 3160, 3167, 3299, & 3460.
92 03 Nov 03 Tail Rotor Pedal Retaining Clips R22s equipped w/ removable pedals originally installed on R22s thru S/N  2373.
93 27 May 04 Comm Antenna Tips R22s S/N 0002 thru 3613.
94 14 Dec 04 A016-2 Main Rotor Blade Replacement All R22 Helicopters equipped with A016-2 Main Rotor Blades.
95 26 Jan 05 A181-4 Lower Actuator Bearing Assembly S/Ns 4563 thru 4981, 4995, 5002, 5003, 5010, and 5017.
96      29 Mar 07 Main Rotor Blade Erosion R22s S/N 0002 thru 4100.
97 22 Feb 08 Pedal Support Safety Tabs R22s S/N 0002 thru 3325 with more than 2200 hours total time in service.
98 22 Feb 08 Removable Collective Spring Pin R22s S/N 0002 thru 4231 with removable controls.
99 30 Apr 10 Gascolator Assembly R22 helicopters S/N 0002 thru 4339
100 30 Apr 10 Carbon Monoxide (CO) Detector Retrofit R22 helicopters S/N 0001 thru 4037 equipped with optional cabin heaters
101 30 Apr 10 Door Lower Hinge Pins R22, R22 Alpha, R22 Beta, & R22 Mariner helicopters S/N 0002 thru 2514, and all non-factory-installed R22 doors
102 30 Apr 10 Battery Relay Bypass Circuit Fuse R22 helicopters S/N 0002 thru 2654
103 30 Apr 10 Main Rotor Blade Bond Inspection R22-series helicopters with A016-4 main rotor blades
104 26 May 10 Clutch Actuator Fuse Holder Wiring R22 helicopters S/N 0002 thru 4481

 
R44 Service Bulletin Index

Bulletin # 

DATE

SUBJECT

A/C AFFECTED
1 24 May 94 Required Modification of Cyclic Trim Motors S/Ns 0006-0070.
2 24 Oct 94 Inspection of Cooling Fan S/Ns 0006-0122.
3 18 Nov 94 Replacement of C007-3 Shaft Assembly and/or D174-1 Fanwheel S/Ns 0001-0073.
4

Ref. AD 95-09-07

 24 Jan 95 Replacement of Guides for C121-7 Push-Pull Guides S/Ns 0001-0150.
 5 26 Apr 95 M.R. Droop Stops and Teeter Stops S/Ns 0001-0177.
 6

Ref. AD 95-11-10

 23 May 95 Placard to Prohibit Pushovers S/Ns 0001-0206.
7 6 June 95 Low RPM Warning Unit Adjustment S/Ns 0001-0214.
7A 8 June 95 Low RPM Warning Unit Adjustment S/Ns 0001-0183 & 0189.
8 8 June 95 Gascolator Drain Valve Torque S/Ns 0001-0183 & 0189.
9 11 Sep 95 Fan Nut Torque All R44s.
10 11 Sep 95 Upper and Lower Swashplate Fork and Arm Linkage Assemblies S/Ns 0001-0206, 0208, 0210, & 0212.
11 11 Sep 95 Replacement of CAT Gauge and Relocation of Probe S/Ns 0001-0201.
12 11 Sep 95 Cyclic Damper Replacement S/Ns 0001-0201.
13 26 Dec 95 Collective Spring Assembly and Spring Assembly Support Replacement A - S/Ns 0001-0063 except 0038, 0044, 0058, & 0061.

B - S/Ns 0038, 0044, 0058, 0061, & 0064-0225 except 0211 & 0222.

14 26 Apr 96 Fanshaft and Fanwheel S/Ns 0006 thru 0246 except 0014, 0069, 0090, 0182, 0186, 0215, 0228, 0237, & 0239.
15

Ref. AD 96-18-22

 2 Aug 96 Main Rotor Gearbox Ring Gear Bolts S/Ns 0001 thru 0232 except S/N 0019, 0067, 0118, & 0215.

16

22 Oct 96

Replacement of C309-1 Panel Assy with V-Belt Restraint

S/Ns 0002 thru 0240.
17

Ref. AD 98-21-36 superseded by
AD 99-23-01

 18 Dec 96 Pilot's Grip Assembly S/Ns 0001 thru 0159 except 0143, 0150, & 0156.
18 16 Apr 97 Pilot's Heater Outlet Air Supply Hose S/Ns 0001 thru 0317, except 0298, 0301, 0306, 0307, 0311, 0312, 0314, and 0315
19 16 Apr 97 Lateral Cyclic Trim Assembly Spring Shaft Wear S/Ns 0002 thru 0321, except 0301, 0306, 0307, 0311, 0312, 0314, and 0319.
20 16 Apr 97 C315 Collective Support Weldment S/Ns 0001 thru 0321 excluding S/Ns 0301, 0306, 0307, 0311, 0312, 0314, and 0319.
21

Ref. AD 97-16-02

 18 Apr 97 Belt Tension Actuator Switches S/Ns 0001thru 0332 excluding S/Ns 0182, 0301, 0319, 0329, and 0331.
22 30 May 97 Tail Rotor Guard S/Ns 0001-0333 excluding S/Ns 0182, 0224, 0228, 0253, 0301, and 0331.
23

Ref. AD 97-16-02

 30 May 97 Replacement of C018-1 Clutch Assembly S/Ns 0001-0322 excluding 0182, 0224, 0228, 0253, 0301, 0306, 0307, 0311, 0312, 0314, and 0319
24 01 Oct 97 Removal of Paint from Tail Rotor Gearbox Attachment Surfaces S/Ns 0001-0374 excluding  0253, 0331, 0343, 0358, 0363, and 0365.
25

Ref. AD98-05-10

 01 Oct 97 Oil Line Elbows S/Ns 0001-0330.
26

Ref. AD 98-04-12

 01 Jan 98 Lateral Cyclic Trim Assembly S/Ns 0002 thru 0420 and 0425, 0426, and 0427.
27 22 May 98 Main Rotor Blade Inspection S/Ns 0002 thru 0486, C016-1 M.R. Blades S/N 0001 thru 1359.
27A

Ref. AD 98-12-19

 29 May 98 Main Rotor Blade Inspection S/Ns 0002 thru 0486 equipped with C016-1 Main Rotor Blades.
27B

Ref. AD 98-22-16

 18 Jun 98 Main Rotor Blade Inspection S/Ns 0002 thru 0486 equipped with C016-1 Main Rotor Blades.
28

Ref. AD 98-22-16

 18 Jun 98 Main Rotor Blade Replacement All R44 Helicopters equipped with C016-1 Main Rotor Blades.
28A

Ref. AD 98-22-16

 27 Oct 98 Main Rotor Blade Replacement All R44 Helicopters equipped with C016-1 Main Rotor Blades.
29

Ref. AD 99-03-05 & AD 2002-23-06

 9 Jul 98 Replacement of Crankshaft Gear Retaining Bolt S/Ns 0010, 0012, 0059, 0076, 0329, and 0331 thru 0486.
30 28 Oct 98 Auxiliary Fuel Tank Drain Tube Shutoff Clamp S/Ns 0002 thru 0529 except 0440, 0485, 0512, 0515, 0519, 0526, 0527, and 0528.
31

Ref. AD 00-07-03

 28 Oct 98 Wire Harness Contact with C726-2 Fuel Line Assembly S/Ns 0002 thru 0462.
32

Ref. AD 99-07-18 & AD 00-08-04

 22 Mar 99 C188-3 Sprag Clutch S/Ns 0001 thru 0541 and S/Ns 0543, 0556, and 0565.
33 3 May 99 C051-1 or -2 Belt Tension Actuator S/Ns 0001 thru 0598 & 0600.
34 21 Jun 99 Tail Rotor Gearbox Output Shaft Bearing Preload S/Ns 0002 thru 0616 except 0440, 0542, 0583, 0592, 0602, 0611, and 0614.
35

Ref. AD 99-17-17

 26 Jul 99 C908-1 Yoke Replacement S/Ns 0219 and S/N 0535 thru 0608 except S/Ns 0565, 0582, and 0592
36

Ref. AD 99-07-18 & AD 00-08-04

 5 Nov 99 C188-3 Sprag Clutch S/Ns 0001 thru 0541 and S/Ns 0543, 0550, 0556, & 0565.
37 17 Jan 00 Aft C121-25 Push-Pull Contact with Mast Fairing Rib S/Ns 0653, 0655, 0661, 0664, 0665, 0667 thru 0678, 0680, thru 0683, 0686 thru 0695, 0698, and 0709
38 3 Mar 00 Hydraulic Reservoir Sequence S/Ns 0653, 0655, 0661, 0664 thru 0696, 0698, 0699, 0701 thru 0713, 0715, 0720, and 0722.
39

Ref. AD 2001-20-18

 12 Sep 00 Horizontal to Vertical Stabilizer Attach Clips Ships equipped w/ C044-1 horizontal stabilizers S/Ns 0009 thru 0224 except S/Ns 0018, 0090, 0094, 0111, 0129, 0144, 0161, 0178, 0201, & 0223.
40 12 Sep 00 Emergency Pop-Out Float Pressure Cylinder Valve Ships w/ emergency pop-out floats thru S/N 0848 except S/Ns 0748, 0811, 0816, 0828, 0829, & 0831.
41 01Aug 01 Tail Rotor Rigging R44s S/Ns 0001 thru 1102.
41A 10 Jun 02 Tail Rotor Rigging R44s S/Ns 0001 thru 1225 except 1183, 1196, 1197, 1198, 1203,1204, 1209 thru 1212, and 1219 thru 1224.
42

CANCELLED dated 15 October 2004

 01Aug 01 C181-3 Lower Clutch Actuator Bearing Lubrication All R44s.
43 01Aug 01 Tail Rotor Pitch Control Bearing All R44s.
43A

Ref. AD 2003-04-05

 10 Jun 02 Tail Rotor Pitch Control Bearing See bulletin.
44 01 Aug 01 Hydraulic Pump Lines and Fittings R44s S/Ns 0002 -1102 Part A R44s S/Ns 0611, 0653, 0655, 0661, 0663-0693 except 0666 and 0679 Part B.
45 15 Nov 02 D202-2 Bracket Replacement R44s S/N 0001 thru 1269 w/ hydraulically-boosted M.R. flight controls.
46 15 Nov 02 D318-1 Muffler & Tailpipe Shield Installation R44s S/N 0001 thru 1269.
47 20 June 03 R44 II Fuel Control Inlet Fitting R44s S/N 10001 thru 10099 except 10016, 10033, 10085, 10087, & 10092.
48 11 Sep 03 R44 II Fuel Control Safety Wire R44 II S/Ns 10001 thru 10148.
49 11 Sep 03 Engine Alternate Air Intake R44s S/N 0001 thru 1204 except 1190 and 1191.
50 11 Sep 03 R44 II Oil Line Clamp R44 II S/Ns 10001 thru 10157 except S/Ns 10033, 10092, 10140,10143, 10147, 10150, 10151, 10152, 10154, 10155, and 10156.
51

Ref. AD 2003-24-51

 24 Nov 03 NAS6605-31 Bolts R44 S/Ns 1210, 0565, 0641, 0987, & 1312 thru 1349.
52 27 May 04 Comm Antenna Tips R44s S/N 0001 thru 1393. R44 IIs S/N 10001 thru 10373.
53 27 May 04 C046-18 Frame Tube R44s S/N 1160 thru 1395 except  1161, 1165, & 1198. 
54 25 Apr 05 R44 II Fuel Control Venturi R44 II S/Ns 10001 thru 10662 except 10600, 10631, 10634,10635, 10640, 10643, 10646, 10650, 10652 thru 10656, 10659, 10660, and 10661.
55 20 Jul 05 R44 II Fuel Control Reorientation (Supersedes SB-54) R44 II S/Ns 10001 thru 10783 except 10673, 10709, 10720, 10721, 10750, 10766, 10768, 10733, 10774, 10766, 10777, and 10778.
56 29 Mar 06 Seat Belt Buckle Assemblies R44s thru S/N 1576 and R44 IIs thru11107 equipped with C628-4 Rev M or prior sear belt buckle assemblies.
57 29 Mar 06 KI-176 R44 Tailpipe Extension Kit R44 and R44 II helicopters with KI-176 tailpipe extension kit installed.
58 28 Jul 06 R44 II Throttle Link  R44 II Helicopters S/N 10001 thru 11367 except S/N 11063, 11293, 11320, 11347, 1350, 11354, 11359, 1362, and 1364.
58A  01 Sep 06 R44 II Throttle Link R44 II Helicopters S/N 10001 thru 11367 except S/N 11063, 11293, 11320, 11347, 1350, 11354, 11359, 1362, and 1364.
59        09 Aug 06 C046-18 Frame Tube Clamp R44 Helicopters S/N 1160 thru  1625 except S/Ns 1161, 1165, & 1198.  R44 II Helicopters S/N 10001 thru 11338 except S/N 11335.
60 15 Sep 06 C771-1 Air Filters w/ Orange Rubber R44 Helicopters S/N 0001 thru  1640.
61   29 Mar 07 Main Rotor Blade Erosion R44 Helicopters S/N 0001 thru 1670. R44 II Helicopters S/N 10001 thru 11570.
62 19 Dec 07 R44 II Throttle Linkage R44 II Helicopters S/N 10001 thru 12029 except S/N 11792, 11951, 11996, 11999, 12007, 12008, 12018, 12023, 12025, 12027, and 12028.
63 22 Feb 08 Pedal Support Safety Tabs R44 Helicopters S/N 0001 thru 1200 with more than 2200 hours total time in service.
64 22 Feb 08 Removable Collective Spring Pin R44 Helicopters S/N 0001 thru 1799. R44 II Helicopters S/N 10001 thru 12010.
65 22 Feb 08 Air Conditioning Duct Wiring R44 II Helicopters thru S/N 12167 equipped with air conditioning.
66 18 Mar 08 D202-2 Bracket Replacement R44 Helicopters S/N 0001 thru 1879 with hydraulically boosted main rotor flight controls. R44 II Helicopters S/N 10001 thru 12242
67 06 Nov 08 R44 II Fuel Hose Supports R44 II Helicopters S/N 10001 thru 12566
68 25 Mar 09 Rigid Fuel Line Replacement R44 Helicopters S/N 0001 thru 2043, and R44 II Helicopters  S/N 10001 thru 12723, unless previously accomplished
69 25 Mar 09 Gascolator Assembly R44 Helicopters S/N 0001 thru 1901. R44 II Helicopters S/N 10001 thru 12222
70 25 Mar 09 Carbon Monoxide (CO) Detector Retrofit R44 Helicopters S/N 0001 thru 1590
71 25 Mar 09 R44 II Throttle Link R44 II Helicopters S/N 10001 thru 12529
72 30 Apr 10 Main Rotor Blade Bond Inspection R44 helicopters with C016-2 main rotor blades, and R44 II helicopters with C016-5 main rotor blades
73 30 Apr 10 Battery Relay Bypass Circuit Fuse R44 helicopters S/N 0001 thru 0312
74 30 Apr 10 MRGB Input Yoke Retaining Nut Torque R44 helicopters S/N 0001 thru 2030. R44 II helicopters S/N 10001 thru 12691, 12693 thru 12697, 12699, & 12704. Spare C006-5 or C006-6 MRGBs Revision AD and prior
75 30 Apr 10 Door Lower Hinge Pins R44 helicopters S/N 0001 thru 0150, and all non-factory-installed R44 doors regardless of helicopter serial number
76 30 Apr 10 Air Conditioning Installation Upgrades R44 II helicopters S/N 10001 thru 13032 equipped with air conditioning, unless previously accomplished
77 26 May 10 Clutch Actuator Fuse Holder Wiring R44 helicopters S/N 0001 thru 2092, and R44 II helicopters S/N 10001 thru 13034