|
R22 SERVICE LETTER/SERVICE BULLETIN (WITHOUT NUMBER) INDEX |
|
|
DATE |
SUBJECT |
A/C AFFECTED |
|
|
22 May
85 |
Modification of A752-2 Headset |
S/Ns
0457-0473 except 0468, 0035, 0053, 0100, 0120, 0167, 0176, 0230,
0269, 0275, 0355, 0371 |
|
|
6 Dec
86 |
Modification of MAP Limit Charts A654-64 Decal for Beta model |
Beta
and Mariner S/Ns 0501-0604 |
|
|
7 Jul
87 |
Float Gear Installation and Removal |
Mariner
R22s |
|
|
15 Jan
88 |
Carburetor Air Inlet Duct |
Mariner
R22s |
|
|
10 Oct
88 |
Latches on Carb Air Box Cover |
S/Ns
0885-0887, 0890, 0184, 0292, 0403, 0436 if equipped with spring
latches on carb air box covers |
|
|
22 Oct
90 |
Installation of New Governor Toggle Switch |
R22
Governors with push-button and light |
|
|
3 Jun
92 |
Replacement of Low RPM Circuit |
S/Ns
2115-2148 |
|
|
22 Jul
92 |
Carburetor Floats |
R22s
repaired or O/H at RHC between 1 Dec 91 and 22 Jul 92 |
|
|
12 May
97 |
Elastomeric Tail Rotor Teeter Hinge Bearings |
R22
Helicopters S/N 2452 and 2634 thru 2642 |
|
|
12 Sep
00 |
SB-10 dated April 27, 1981and SB-44 dated 5 February 1985 |
CANCELLED |
|
|
11 Jan
02 |
Modification of D723-1 Oil Filter Adapter to facilitate oil filter
removal |
R22
Helicopters S/N 3277, 3278, 3285, 3286, & 3289 |
|
R22 SERVICE LETTER (WITH NUMBER) INDEX |
|
NO. |
DATE |
SUBJECT |
A/C AFFECTED |
|
SL-1 |
22 Jul
80 |
Cabin Heat Blower Assembly A643 |
S/Ns
0006-0022 |
|
SL-2 |
22 Jul
80 |
T.R. Control Push-Pull Tube A121-13 |
S/Ns
0025-0027 |
|
SL-3 |
22 Jul
80 |
T.R. Control Pedals |
S/Ns
0003-0008 |
|
SL-4 |
22 Jul
80 |
Battery Ground Strap |
S/Ns
0002, 0006-0016, 0018-0020, 0022-0032 |
|
SL-5 |
29 Oct
80 |
Installation of Nickel Plated Washers in the Fwd and Intermediate
Flex Plates |
S/Ns
0002-0041 |
|
SL-6 |
24 Sep
80 |
Inspection of A193-2 Flex Plate |
S/Ns
0002-0058 |
|
SL-7 |
27 Sep
80 |
Inspection of Long T.R. Drive Shaft |
S/Ns
0002-0058 |
|
SL-8 |
3 Oct
80 |
Action required when Main Rotor Chip Light comes on |
All
R22s |
|
SL-9 |
27 Jul
81 |
Installation of A214-3 Safety Washers |
S/Ns
0002-0161, 0167, 0169-0172 |
|
SL-10 |
11 Aug
81 |
Engine Idle Speed Limitations |
S/Ns
0002-0232 |
|
SL-11 |
18 Aug
81 |
Loose Upper Cylinder Base Nuts |
S/Ns
0045-0160 |
|
SL-12 |
19 Aug
81 |
Premature Wear of A190-1 V-Belts |
S/Ns
0002-0167 |
|
SL-13 |
10 Sep
81 |
Loose Horizontal Firewall to Steel Tube Frame Attach Bolts |
S/Ns
0002-0150, 0152-0182, 0184-0188, 0190-0195, 0198 |
|
SL-14 |
16 Sep
81 |
Inspection of A197 T.R. Drive Shafts |
All
R22s |
|
SL-15 |
23 Sep
81 |
Visual inspection of Main Rotor Blade Root Area |
M.R.
Blades A016 S/Ns 0100-0593 Rev. A-V |
|
SL-16 |
19 May
82 |
Installation of A911-1 Cabin Heater Scoop |
S/Ns
0002-0187 equipped with cabin heater systems |
|
SL-17 |
17 May
82 |
Removal of Cabin Heater Muffler Shroud in warm weather to extend
muffler service life |
All
R22s equipped with cabin heater systems |
|
SL-18 |
7 Jun
82 |
Installation of Mixture Control |
All
R22s |
|
SL-19 |
7 Jun
82 |
Installation of Guard for Removable Cyclic Stick |
All
R22s equipped with optional removable cyclic control |
|
SL-20A |
20 Jun
84 |
Vee Belt Installation |
All
R22s |
|
SL-21 |
17 Feb
84 |
Checks or Cracks in Main Rotor Blade Sealant and Filler |
All
R22s |
|
SL-21A |
31 May
02 |
Main Rotor blade sealant and filler cracking |
R22s
with P/N A016-2 |
|
SL-22 |
17 Feb
84 |
Replacement Bearings for Tail Rotor Teeter Hinge and Severe Hazard
when using any Non-Approved Bearings |
All
R22s |
|
SL-23A |
20 Jun
84 |
Special Caution when installing V-Belts or other Driveline
Components |
All
R22s |
|
SL-24 |
6 Nov
84 |
Removal of Clutch Yokes before shipment |
All
R22s |
|
SL-25 |
1 Jan
85 |
Modification of A437 Jackshaft Brace Tab |
S/Ns
0002-0435 |
|
SL-26 |
15 Apr
86 |
Battery Terminal Misalignment |
S/Ns
0002-0545 |
|
SL-27 |
1 Oct
86 |
New A190-2 Banded V-Belt Installation |
Whenever installing A190-2 banded v-belts |
|
SL-28 |
17 Dec
86 |
Avco Lycoming Service Bulletin No. 477 |
S/Ns
0525-0602, 0604, 0608, 0610, 0002, 0014, 0023, 0033, 0037, 0054,
0056, 0110, 0140 0164, 0184, 0190, 0214, 0229, 0237, 0268, 0274,
0285, 0289, 0325, 0330, 0343, 0376, 0398, 0423, & 0439 |
|
SL-29 |
14 Sep
87 |
Proper use of Starter Switch to avoid breaking starter |
All
R22s |
|
SL-30 |
16 Nov
87 |
Magneto Switch Wiring |
S/Ns
0002-0726 except S/Ns 0002-0077 with impulse coupling installed |
|
SL-31 |
12 Apr
88 |
A184-1 Clutch Bearing |
All
R22s |
|
SL-32 |
7 Nov
88 |
Overrunning of Sprag Clutch |
Any R22
and especially those with A018 clutches manufactured or O/H 1 Feb 88
thru 31 Oct 88 |
|
SL-33 |
18 May
89 |
Aeroquip Corp. Bulletin No. 0001 |
S/Ns
0002-0820 |
|
SL-34 |
15 Sep
89 |
Excessive Oil Leakage from Tail Rotor Gearbox Breather Tube |
All
R22s |
|
SL-35 |
6 Jun
90 |
Alignment of V-Belt Sheaves |
All
R22s |
|
SL-36 |
5 Oct
90 |
Alignment of Fan Shaft Bearing Housing |
All
R22s |
|
SL-37 |
Nov
90 |
Carburetors Service Bulletins |
All
R22s |
|
SL-38 |
22 Mar
91 |
Tail Rotor Paint Scheme |
All
R22s |
|
SL-39 |
19 Apr
91 |
V-Belt Installation |
S/Ns
0002-1770 |
|
SL-40 |
28 Aug
91 |
Tail Rotor Visual Guard |
S/Ns
0002-1889 |
|
SL-41 |
13 Mar
92 |
False Low RPM Warning occurring during radio transmissions |
S/Ns
0002-2059 |
|
SL-42 |
18 Jun
92 |
Replacement of Inlet Ducts |
S/Ns
0002-2151 |
|
SL-43 |
8 Oct
92 |
Additional Caution Decal for Baggage Compartments |
S/Ns
0002-2320 |
|
SL-44 |
20 Oct
92 |
Replacement of Fuel Shut-Off Guard |
S/Ns
0002-2230 |
|
SL-45 |
23 Sep
94 |
T.R.G.B. Shaft - Keys Terminating Action for AD-94-17-07 |
Reference AD-94-17-07 and SB-74 |
|
SL-46 |
23 Sep
94 |
M.R. & T.R.G.B. Chip Detectors |
All
R22s |
|
SL-47 |
10 Apr
96 |
"Governor Off" Caution Light |
R22's
without light |
|
SL-48 |
4 Mar
97 |
A184 Upper Clutch Actuator Bearing |
All
R22s |
|
SL-49 |
8 Sep
98 |
Master Battery Relay |
S/Ns
2786, 2793, & 2797-2847, & all R22s factory overhauled 2-98 thru
7-98 |
|
SL-50 |
2 Oct
98 |
Mixture Control Cable Clamp |
All
R22s |
|
SL-51 |
14 Apr
99 |
Tachometer Contact Assy in Magneto |
- |
|
SL-52 |
1 Aug
01
(Supersedes SL-49) |
Master Battery Relay Upgrade |
All
R22s |
|
SL-53 |
21 Nov
01 |
Visual Inspection of Main Rotor Blade Root Area |
All
R22s |
|
SL-54 |
25 Mar
04 |
Revised Main Rotor Blade Retirement Life |
All
R22s |
|
|
Revised
31 Mar 04 |
|
