| Piper Service Letter # |
Subject |
| 114 | PA-16 Cowl Rivets |
| 129 | PA-17 Landing Gear Strut End Fittings |
| 136 A | PA-20 &22 Fuel Line Chafing and Fuel Valve Operation |
| 138 | PA-20 Rudder Pedal Tube Attachment |
| 140 | PA-20 Rudder Cable Rub Block |
| 143 | PA-20 Stabilizer Adjustment Cable Pully Mod. |
| 144 | PA-15-17 Fuselage Doors |
| 145 | PA-20 Auxiliary Fuel Line |
| 146 | PA-20 Front Seat Frame Revision |
| 153 | PA-20 Windshield Supports |
| 154 | Addition of Felt Strips on Fuel Tank Cover |
| 157 | PA-16 & PA-20 Loose Connections |
| 159 | PA-20 Baffle Seal |
| 161 | "Duraclad" Finish |
| 169 | Manifold Pressure Gauge Installation |
| 175 | PA-22 Nose Wheel Bumper Block Spacer Plate |
| 176 | PA-20-22 Stabilizer Adjustment Mechanism |
| 177 | Firewalls |
| 180 | PA-22 Nose Wheel Mount Stiffner Brace |
| 186 | PA-22 Tail Pipe Clearance |
| 187 | PA-22 Brake Lever |
| 194 | PA-20-22 Sealing of Firewall |
| 207 | Quick Drain Valve Assembly |
| 209 | PA-20-22 Navigation Light Switch |
| 212 | PA-22 Nose Wheel Shimmy Dampener |
| 213 | PA-20-22 Primer Lines |
| 214 | PA-20-22 Navigation Light Switch |
| 216 A | Replacement of Aileron Hinge Block Bearing Blocks |
| 220 | .040 Brass Safety Wire |
| 221 | Carburetor Air Filter |
| 223 | Engine Support Bushings |
| 228 | Two Person Safety Belts |
| 233 | Fuel Selector Valve |
| 241 | 1955 Cigarette Lighters |
| 243 | PA-22 Engine Mount |
| 248 | PA-22 Auxiliary Fuel Tank |
| 258 | PA-22 Fuel Tank Cap |
| 260 | 1956 PA-22 Brake System |
| 283 A | 100, 500, & 1000 Hour Inspection Forms |
| 295 A | Aircraft Finishes |
| 298 A | Obsolete Airplanes |
| 303 A | Aircraft Finishe |
| 312 | PA-22 Tooling - Piper Auto Control |
| 321 | Piper AutoControl |
| 324 C | Exhaust System Inspections |
| 327 | FAA Release No. 434 |
| 328 | Lycoming Service Letter No. L126 |
| 329 | PA-22 Inspection of Oil Cooler Lines |
| 348 | PA-22-108 Replacement of Airspeed Indicators |
| 349 | Adjustment of Engine Support Bushings |
| 353 A | PA-22-108 Propeller Decal |
| 355 | Stainless Steel Control Cables |
| 358 B | Inspection of Engine Nose Wheel Mount Assembly |
| 362 B | Modification of Windshield top Attachment |
| 369 | Inspection of Brake Cable and Pulleys |
| 373 | Installation of Oil Shields on Airborn Dry Vacume Pumps |
| 392 | Inspection of Nose Wheel Shimmy Dampener |
| 400 | Tail Brace Rods |
| 405 | Upper Nose Gear Oleo Bearing |
| 406 | PA-20-22 Revision of Owners Handbook |
| 410 | Inspection and Lubrication of Stabilizer Yoke and Yoke Screw |
| 423 | PA-22-108 Muffler and Tailpipe Support Kits |
| 486 A | Cylinder Head Temperature Probe Location |
| 529 | Approved AutoPilot Gyro Instrument Overhaul Centers |
| 609 | Control Surfaces Inspection and Maintenance Guidelines |
| 633 | Inspection and Repair of Flood Exposed Airplanes |
| 653 | Serrated Throttle Lever and Shaft - Lycoming Instruction 1265 |
| 740 | Aviation Fuel Requirement for Lycoming Engines |
| 944 | Fuel Selector Valve Inspection and Lubrication |
| 953 | Shoulder Harness Installation Availability |
| 1069 | Flight Control Cable Terminal Corrosion Inspection |
| 1135 | Control Cable Pully Inspection |
| 1141 | Gascolator Maintenance Procedures |
