Oil Baffle Screws, E Reduction Gear Assemblies
20-Oct-1944
Circular Letter No. 210
|
Alcohol - Water Pressure - Spasmodic Flow
10-April-1945
Circular Letter No. 252
|
Coolant Line Chafing P-63
17-Jan-1945
Circular Letter No. 228
|
Torque - External Nuts and Screws
30-Mar-1945
Circular Letter No. 193 Supplement
|
Scintilla Ignition Coils from Bulletin #111
11-Jan-1944
Circular Letter No. 128
|
Retorquing Rocker Arm Stud Nuts
20-Sept-1945
Circular Letter No. 236A
|
Inspection on Air Maze Oil Filter, #53073, Prior to Change F on -99 Engines
19-June-1944
Circular Letter No. 163
|
Fuel Selector Valve Malfunctioning P-63A
3-May-1944
Circular Letter No. 153A
|
PT-13E9 Carburetors - Matching with Discharge Nozzles
28-June-1944
Circular Letter No. 171A
|
Compression Check Method
25-Aug-1944
Circular Letter No. 189
|
Part Number Changes to be Accomplished at Overhaul when Complying with T.O. 02-5AD-12
29-June-1945
Circular Letter No. 262
|
Cross Over Baffle -93 Engine
28-June-1944
Circular Letter No. 179
|
Briggs Clarifier Operation
26-July-1944
Circular Letter No. 185
|
Jet - Supercharger Vent Air Metering - Part #53998
8-July-1944
Circular Letter No. 181
|
Oil Hopper Tank Sump Drain
20-Mar-1945
Circular Letter No. 247
|
Chafed or Frayed Ignition Switch Wires Conducive to Backfiring
9-May-1944
Circular Letter No. 165
|
Rivets, Part AN-435-5-6, Holding the Reduction Gear Pinion Plug 37097 in the Pinion
18-Jan-1944
Circular Letter No. 131
|
Coolant System
13-Jan-1944
Circular Letter No. 129
|
Removal of Manifold Pressure Regulator for P-38
30-Nov-1943
Circular Letter No. 119
|
Distributor Heads and Fingers - Cleaning
17-Oct-1944
Circular Letter No. 207
|
Nozzle - Reduction Gear Pinion Oiler - Part No. 40962
19-May-1944
Circular Letter No. 172
|
Curtiss Propeller Surging
3-Nov-1943
Circular Letter No. 117
|
E-11 Operation
11-Mar-1944
Circular Letter No. 145
|
Information on the V-1710-99 (F26R)
15-Oct-1943
Circular Letter No. 105A
|
Air Scoop Hot Air Shutter on P-40N
19-Feb-1944
Circular Letter No. 139
|
Replacing High Tension Cables in Distributor Caps
19-Feb-1944
Circular Letter No. 140
|
Refinishing of Aircraft Engines at Overhaul
20-Mar-1944
Circular Letter No. 124-A
|
Pipe Plugs Engine External
27-Sept-1944
Circular Letter No. 201
|
Manifold Pressure Gauge Line P-38J
18-May-1944
Circular Letter No. 169
|
Distributor Needs Low Voltage Continuity Check of Cable Connections
17-Oct-1944
Circular Letter No. 205
|
Distributor Finger, Melmac, #10-28705, Cracking at Mounting Flange
6-Mar-1945
Circular Letter No. 224 Supplement
|
Airscoop - P-63 Target Ships
7-Mar-1945
Circular Letter No. 243
|
Magneto Timing Control D.F.L.N.-5
21-Sept-1944
Circular Letter No. 198
|
Low Oil Temp P-40Ns
18-Jan-1945
Circular Letter No. 227 Supplement
|
Spark Plug - RP43S Released for Use in Production Engines
17-Jan-1945
Circular Letter No. 231
|
Outboard Reduction Gear Rear Case Change to Accommodate Larger Mouting Studs
19-May-1944
Circular Letter No. 173
|
Oil System Servicing P-63
6-Mar-1945
Circular Letter No. 242
|
Oil Dilution
7-Oct-1943
Circular Letter No. 109
|
Manifold Pressure Regulator Brace Part #42690
27-Jan-1944
Circular Letter No. 130A
|
Elimination of Coolant Jacket Bleed Holes
19-Feb-1944
Circular Letter No. 138
|
Modification of PT-13E9 Carburetor Setting of Dry Installation
28-June-1944
Circular Letter No. 171A Supplement
|
Loss of Manifold Pressure and Auxiliary Stage Oil Pressure While Performing Acrobatics P-63
1-Feb-1945
Circular Letter No. 236
|
Cuno or Air Maze Oil Filter Gasket #35398
27-April-1944
Circular Letter No. 157
|
Handling of Engine Parts in Process of Overhaul
25-July-1944
Circular Letter No. 184
|
Periodic Oiling of all SC and PC Control Linkage
1-May-1944
Circular Letter No. 160
|
Engines Cutting Out on Take-off P-40
13-Nov-1944
Circular Letter No. 218
|
Supercharger Control and Regulator Inter Connecting Link #43078
20-April-1944
Circular Letter 156
|
Valve Spring Fatigue
8-Mar-1945
Circular Letter No. 244
|
Materials Going Through Air Scoops into Engines
20-Oct-1943
Circular Letter No. 114
|
Distributor Finger, Melmac, #10-28705, Cracking at Mounting Flange
28-Dec-1944
Circular Letter No. 224
|
Screw, Throttle Valve, Part #P15737 - Carburetor
28-Nov-1944
Circular Letter No. 221
|
Check for Sheared Front Scavenge Pump Drive
31-Oct-1944
Circular Letter No. 161A
|
Coolant Expansion Line Tee on P-38's
13-April-1944
Circular Letter No. 152
|
Matching Carburetors on Engines being Installed in P-38
4-Dec-1943
Circular Letter No. 122
|
Steel Wool on Cuno and Magnetic Plug
22-Feb-1944
Circular Letter No. 141
|
Carburetor Mixture Setting - P-40N-40
13-Nov-1944
Circular Letter No. 217
|
Oil Tank Modification of P-63 Series Aircraft
19-Jan-1945
Circular Letter No. 232
|
Carburetor Jet Change, K-8, on -111 & -113 Engines
28-Dec-1944
Circular Letter No. 225
|
Information on the V-3420-23 (-B10) Model Engine
2-June-1944
Circular Letter No. 176
|
Rework of Engine Crankcase Breather Vents
11-Mar-1944
Circular Letter No. 144
|
Low Oil Temp P-40N-40
15-Jan-1945
Circular Letter No. 227
|
Magneto Timing Control D.F.L.N.-5
13-Nov-1944
Circular Letter No. 198 Supplement
|
Matching of Propeller Governor Arm Serrations - P-40
31-Dec-1943
Circular Letter No. 126
|
Generator Protection - Voltage Regulator Maintenance
22-Jan-1945
Circular Letter No. 233
|
Reported Effect of Uninhibited Ethylene Glycol on Coolant Pump Seals
17-March-1945
Circular Letter No. 166
|
Nut - Propeller Shaft Thrust Bearing Retainer #41058
22-Mar-1945
Circular Letter No. 248
|
Carburetor Major Setting Variables
31-May-1945
Circular Letter No. 259
|
Pressure Gage - Fuel and Oil
26-Feb-1945
Circular Letter No. 238
|
Oil Pump Failures in Reduction Gear Assemblies
28-Sept-1943
Circular Letter No. 102
|
Oil Temperature Operating Limits
20-Oct-1944
Circular Letter No. 209
|
Carburetor Idle Spring Adjustment Screws
1-Nov-1943
Circular Letter No. 116
|
Cross Over Baffle -93 Engine
6-July-1944
Circular Letter No. 179 Supplement
|
Ignition Switch, A.C. Type A-9
13-April-1944
Circular Letter No. 154
|
Rubber Covers Placed on Auto Mixture Control Units - Carburetor
17-Jan-1945
Circular Letter No. 229
|
Check for Sheared Front Scavenge Pump Drive
5-May-1944
Circular Letter No. 161
|
Induction Pipe Stud, Method of Locking
27-June-1945
Circular Letter No. 261
|
Use of Modifier Unit on Automatic Engine Control Part 43801
12-Feb-1944
Circular Letter 135
|
Piston Ring Gap Clearances
11-Jan-1944
Circular Letter No. 99
|
Correct Oil Pressure Relief Valve Body
13-Oct-1943
Circular Letter No. 111
|
Oil Tank Support Assemblies - P-63 Replacement of Burtex Pads
12-Mar-1945
Circular Letter No. 245
|
Oil Change
11-April-1944
Circular Letter No. 151
|
Carburetor Settings - 91 Versus 100 Octane Fuel
22-Dec-1944
Circular Letter No. 206
|
F Reduction Gear 3/4" Square Shank Pipe Threaded Plugs
11-Jan-1944
Circular Letter No. 118A
|
Air Filter Control Valve for P-38H Location Wheel Well
2-Dect-1943
Circular Letter No. 120
|
Cuno or Air Maze Oil Filter Gasket #35398
25-July-1944
Circular Letter No. 157
|
Stud #43127 - Intake Manifold Lower Boss
31-May-1945
Circular Letter No. 258
|
Coolant System Filling Procedure for P-39 & P-63 Ships
26-Feb-1945
Circular Letter No. 235A
|
Oil Temperature Operating Limits
23-Oct-1944
Circular Letter No. 209A
|
Limiting Power of V-1710 Engines in Domestic Operations
30-Jan-1945
Circular Letter No. 234
|
Carburetor Air Temperature and Mean Effective Pressure Charts
30-Aug-1944
Circular Letter No. 190
|
Low Oil Pressure in Overhauled Engines on Test Stands
14-Sept-1944
Circular Letter No. 196
|
Water Injection Operation Following Engine Change
14-June-1945
Circular Letter No. 260
|
Induction Pipe Tie Strap
7-Oct-1943
Circular Letter No. 113A
|
Fuel Consumption Installation - Apparent Differential in P-38 Installation
15-May-1945
Circular Letter No. 255
|
Reduction Gear Pinion Plug
23-Mar-1945
Circular Letter No. 131
|
Bolts, Engine and Center Bearing Mount - Torque Recommendations - P-39
17-Feb-1944
Circular Letter No. 136
|
Carburetor Throttle Rod Binding Caused by use of Large Washer
29-May-1944
Circular Letter No. 175
|
Numbering of Engines by Overhaul Depots
10-April-1944
Circular Letter No. 149
|
Advanced Information Caution
27-June-1944
Circular Letter No. 178
|
Coupling Assembly -Magneto Timing
13-Nov-1944
Circular Letter No. 219
|
Cover - Supercharger Inlet, Part #54026
5-May-1945
Circular Letter No. 253
|
Check Valve - Oil Separator to Oil Return Line - P-63
28-Mar-1945
Circular Letter No. 249
|
Aerated Accelerating Pump and Water in Fuel System on P-63 Aircraft
13-Sept-1944
Circular Letter No. 195
|
Oil Tank Access Door P-38, P-40 & P-51
14-Feb-1945
Circular Letter No. 239
|
Checking Coolant Expansion Tank Relief Valve
27-April-1944
Circular Letter No. 158
|
C-15 Accessory Housing Vent Connections
9-May-1944
Circular Letter No. 164
|
Coolant System Pressure Relief Valve Information
25-July-1944
Circular Letter No. 177 Supplement
|
Adjusting Automatic Engine Control Assembly - 43801
13-Oct-1943
Circular Letter No. 112
|
Spray Nozzle Gaskets
19-May-1944
Circular Letter No. 174
|
Carburetor Mixture Control Plate #70 Bleed Hole -111, -113, -115 Engines
1-Mar-1945
Circular Letter No. 241
|
Installation of NaMBT Inhibited AN-E-2, Ethylene Glycol in Installations Previously Operated with AN-E-2 Glycol
9-May-1944
Circular Letter No. 166
|
Reports of Engine Cutting Out and Backfire in P-40N - Low Throttle Glides
21-Feb-1944
Circular Letter No. 133A
|
Piercing Screws - Distributor Heads
30-Oct-1944
Circular Letter No. 214
|
Water Line - Plug - Dry Operation
13-Nov-1944
Circular Letter No. 220
|
AAF List of Supply Requirements for the Alternate Installations of Allison Engines
27-July-1944
Circular Letter No. 127A
|
Vapor Vent Needle - Carburetor
8-Nov-1944
Circular Letter No. 216
|
Supplement, P-40 Vibration Check Tips
12-Oct-1943
Circular Letter No. 110
|
Spark Plug RP-43
22-Feb-1945
Circular Letter No. 231 Supplement
|
P-63 Auxiliary Stage Oil Starvation
29-Sept-1944
Circular Letter No. 204
|
Cracking of Melmac Distributor Heads Part 10-27751
3-Feb-1944
Circular Letter No. 132
|
E-11 Operation
10-Nov-1944
Circular Letter No. 145
|
Air Maze Oil Filter Inspection - Aluminum Foil
10-April-1944
Circular Letter No. 148
|
Failure of Cuno Oil Strainer - Part 35398
20-Mar-1944
Circular Letter No. 146
|
Carburetor Settings - 91 Versus 100 Octane Fuel
12-Oct-1944
Circular Letter No. 206
|
Carburetor Air Screens
25-Aug-1944
Circular Letter No. 188
|
Auxiliary Stage Supercharger Mounting Bosses
19-Sept-1944
Circular Letter No. 197
|
Supercharger Inlet Cover Gasket #36852 Rework
17-April-1944
Circular Letter No. 155
|
Coolant System Pressure Relief Valve Information
6-June-1944
Circular Letter No. 177
|
Spring - Oil Pressure Relief Valve - Part #54464
19-May-1944
Circular Letter No. 170
|
Part #42206 BH Scroll, Auxiliary Supercharger
16-May-1944
Circular Letter No. 167
|
Nailing Spark Plugs Leads
11-Feb-1944
Circular Letter No. 134
|
Preparing Magnetos for Service
19-Mar-1944
Circular Letter No. 125B
|
Air Passage Hole in Supercharger Inlet Cover
12-Sept-1944
Circular Letter No. 194
|
Inspection of Air Maze Oil Filter, #53073, Prior to Change F
5-May-1944
Circular Letter No. 163
|
Cylinder Stud to Block Oil Seal #54143
30-Oct-1944
Circular Letter No. 215
|
Fires in P-38 Aircraft
6-July-1944
Circular Letter No. 180
|
Screen - 54391 Aux, Stage Supercharger Vent -93 & -117 Engines
15-Jan-1945
Circular Letter No. 226
|
Torque - External Nuts and Screws
Circular Letter No. 193
|
Distributor Heads and Fingers, Melmac, Moisture Absorption
27-Sept-1944
Circular Letter No. 202
|
Starter Jaw Engagement
11-April-1944
Circular Letter No. 150
|
Propeller Shaft Thrust Bearing Oil Seal - Replacement on F Engines
26-Oct-1944
Circular Letter No. 212
|
Valve - Aircraft Coolant Relief
29-Mar-1945
Circular Letter No. 250
|
P-63 Installation Fire Hazard
5-Sept-1944
Circular Letter No. 192
|
Coolant System Filling Instructions as Recommended by Allison
23-Feb-1944
Circular Letter No. 142
|
Installation of Oil Return Elbows on Model E and F Engines
22-Mar-1944
Circular Letter No. 147
|
Excessive Smoking - Right Bank - Exhaust Stacks 1, 2 & 3
2-Oct-1943
Circular Letter No. 106
|
Dow-Corning Compound #4 Stock No. 7300-223100 as Recommended in T.O. 03-5E-1
26-Oct-1944
Circular Letter No. 213
|
Y Drain Oil Leak
2-Dec-1943
Circular Letter No. 121
|
Supercharger Drive Gear Train 9.6 to 1 Ratio
14-Sept-1944
Circular Letter No. 191
|
Carburetor Idle Spring
17-July-1944
Circular Letter No. 168
|
Distributor Shaft Bearing Gage, #43545-B
3-May-1944
Circular Letter No. 162
|
Tube - Regulator Oil Pressure, Part #44297
9-May-1945
Circular Letter No. 254
|
Chafing - RP-63 Target Ships
19-May-1945
Circular Letter No. 256
|
Coolant Expansion Tank Support Bracket P-63
22-Feb-1945
Circular Letter No. 240
|
Jacobson Test Stands
2-Aug-1944
Circular Letter No. 187
|
Tool Kits - Engines
20-Oct-1944
Circular Letter No. 211
|
Plug - 3- inch Square Shank Pipe, Part #54833, Stainless Steel
29-May-1945
Circular Letter No. 257
|
Hydrometer Type Coolant Testers for Determination of Ethylene Glycol Concentration
4-Dec-1944
Circular Letter No. 222
|
Spark Plugs
17-Dec-1943
Circular Letter No. 123
|
Reduction Gear Case, Outboard - Change & Identification of Oil Baffle Plate
13-Mar-1945
Circular Letter No. 246
|
Synchronized Quadrant Schedule for P-39 and P-63
19-Feb-1944
Circular Letter No. 137
|
Coolant Leaks
28-Sept-1944
Circular Letter No. 203
|
Spark Plug Operation
2-Mar-1944
Circular Letter No. 143
|
Operation and Maintenance on V-3420-23, B-10
19-Aug-1944
Circular Letter No. 183A
|
Bleeding Vapor Mechanical Accelerating Pumps
29-April-1944
Circular Letter No. 159
|
Vapor Vent Needle - Carburetor (Float Modification)
24-Jan-1945
Circular Letter No. 216 Supplement
|
Plug Assembly - Supercharger Drain
13-Dec-1944
Circular Letter No. 223
|
Water Injection - Why We Use It
18-Oct-1944
Circular Letter No. 208
|
Cotter Pins Engine Proper Reduction Gear and Aux. Stage
27-Sept-1944
Circular Letter No. 199
|
Quality Improvements Affecting Vibration Characteristics of the P-39
26-Oct-1943
Circular Letter No. 115
|
Water Injection Pump Switch
2-Aug-1944
Circular Letter No. 186
|
Nut - Oil Filter Sleeve, Part #44655
3-April-1945
Circular Letter 251
|
E-11 Operation
10-Nov-1944
Circular Letter No. 145
|
Preparation of Engine for Service After Extended Storage
1-Feb-1945
Circular Letter No. 237
|
