ROBINSON HELICOPTER
 Service Bulletins Complete Listing
 

       

 
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Revised: 18 Mar 2008
 
  R22 Service Bulletin Index 
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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.