Service Letter Index
| Piper Letter # | Description | Issue Date | Comments |
| SL938 | Forward Baggage Door Mod. | 7/10/84 | |
| SL965 | Hydraulic Pump Installation | 9/25/85 | |
| SL967 | Lower Cabin Door Mod. | 6/28/84 | |
| SL968A | Oil Door/Cowl Mod. | 7/28/86 | |
| SL970 | Main Gear Door Linkage | 8/7/84 | |
| SL971B | Engine Baffle Mod./Oil Cooler Clip | 2/23/87 | |
| SL972 | Hydraulic Pressure Gauge Line Fitting Replacement/ Poppet Spring | 8/20/84 | |
| SL973 | Lower Cabin Door Step Up Stop Installation | 8/20/84 | |
| SL974 | Nose Cowl Replacement | 8/20/84 | |
| SL975 | Lower Cabin Door Air Duct Seal Mod. | 2/13/85 | |
| SL976 | Seat Pan Reinforcement | 8/20/84 | |
| SL978 | Cabin Heat Valve Mod. | 1/15/86 | |
| SL981 | Engine Tachometer Replacement | 10/22/85 | |
| SL982 | Turbo Inlet Temperature Probe Wiring Mod. | 2/4/86 | |
| SL984 | Hydraulic PumpAnnunciator and Controller | 7/15/86 | |
| SL985 | Engine Cylinder Check/Alternate Air Intake Assembly Mod. | 4/18/86 | |
| SL989 | Induction Air Panel -Stiffener Installation | 8/20/86 | |
| SL990 | Operating Limitations | 11/17/86 | |
| SL991 | Oxygen System Mod. | 11/18/86 | |
| SL992 | Stereo System Mod. | 12/19/86 | |
| SL995A | Landing Gear Actuator Switch Mod. | 5/28/87 | |
| SL996 | Engine Mount Heat Shield Mod. | 3/5/87 | |
| SL999 | Air Conditioning Compressor Mount Mod. | 7/17/87 | |
| SL1000 | Nose Gear Door Hinge Mod. | 10/16/87 | |
| SL1001 | Engine Mount Mod. | 12/9/87 | |
| SL1004 | Main Gear Door Mod. | 5/23/89 | |
| SL1006 | Fuel Vent Line Mod. | 8/25/89 | |
| SL1009 | Autopilot Modification | 9/19/90 | |
| SL1011 | Nose Gear Trunnion Mod. | 4/27/94 | |
| SL1012 | Aileron Cable Mod. | 11/30/94 | |