Service Letter ME| Name | Revision | Lang | Subject | Date |
|---|
| ME68-13 | | en | AIR-STAIR DOOR IMPROVEMENTS | 07/12/1968 |
| ME69-6 | | en | FLAP LIMIT SWITCH PROTECTION | 02/28/1969 |
| ME69-16 | | en | WING TIP TANK PUMP INSTALLATION | 08/14/1969 |
| ME69-22 | | en | TURBOCHARGER WASTE-GATE ADJUSTMENT | 08/06/1969 |
| ME69-24 | | en | SCAVENGE PUMP DRIVE GEAR AND KEY REPLACEMENT | 09/09/1969 |
| ME69-38 | | en | FUEL AND OIL LINE PROTECTION | 12/19/1969 |
| ME69-40 | | en | Emergency FLIGHT MANUAL AND PILOT CHECKLIST REVISION | 12/29/1969 |
| ME70-7 | | en | 800 NAVIGATION SYSTEM DIODE; FUEL PUMP FILTER INSPECTION; PARTS ORDERS FOR MCCCAULEY PROPELLER HUBS | 01/30/1970 |
| ME70-16 | | en | 800 DME COOLING KIT | 04/21/1970 |
| ME70-24 | | en | FUEL QUANTITY GAGE COOLING KIT | 07/07/1970 |
| ME70-26 | | en | IMPROVED CONTACTS FOR 400 SERIES NAV/COM | 07/15/1970 |
| ME70-35 | | en | IMPROVED IGNITION HARNESS (Slick Manufactured) | 10/16/1970 |
| ME70-39 | 1 | en | FUEL CROSSOVER LINE INSPECTION | 04/04/1975 |
| ME70-43 | | en | ALTERNATE AIR INTAKE DEFLECTOR BAFFLE INSTALLATION | 12/23/1970 |
| ME71-12 | | en | FIREWALL SEALANT INSPECTION | 05/14/1971 |
| ME71-17 | | en | WING STROBE LIGHT FLASHTUBE INSTALLATION | 06/28/1971 |
| ME71-20 | | en | IMPROVED OSCILLATOR CAVITY (400 and 800 Transponder) | 08/20/1971 |
| ME 72-4 | | en | POWERPLANT SYSTEM IMPROVEMENTS | 03/24/1972 |
| ME72-5 | | en | HORIZONTAL STABILIZER SKIN INSPECTION | 04/07/1972 |
| ME72-11 | | en | FIREWALL SCREW INSPECTION AND REPLACEMENT | 05/26/1972 |
| ME72-19 | | en | WING FLAP ACTUATORMODIFICATION | 10/06/1972 |
| ME72-25 | | en | NEW IMPROVED SLIP-JOINT SEALS | 12/15/1972 |
| ME73-1 | | en | FLAP ACTUATOR ASSEMBLY - REPLACEMENT OF COMPONENTS | 01/12/1973 |
| ME73-4 | Supplement 1 | en | TIP TANK NOSE CAPS - FUEL SEAL INSPECTION | 11/22/1974 |
| ME73-5 | Supplement 1 | en | FUEL SYSTEM IMPROVEMENTS | 09/07/1973 |
| ME73-6 | | en | TURBOCHARGER MODIFICATION | 03/23/1973 |
| ME73-11 | 1 | en | PROPELLER ATTACHMENT IMPROVEMENT | 08/17/1973 |
| ME73-14 | | en | HEATER IGNITION MODIFICATION AND TROUBLESHOOTING; YAW DAMPER CABLE INSPECTION | 08/10/1973 |
| ME73-25 | | en | USE OF FUEL ADDITIVES FOR COLD WEATHER OPERATION | 11/02/1973 |
| ME73-29 | | en | IMPROVED CABIN VENTILATION; BATTERY BOX RETENTION BLOCK | 11/30/1973 |
| ME74-7 | | en | PROPELLER DEICE SYSTEM IMPROVEMENTS; IMPROVED OVERVOLTAGE RELAYS | 05/02/1974 |
| ME74-13 | | en | VOLTAGE REGULATOR MODIFICATION | 08/09/1974 |
| ME74-19 | | en | UNITED INSTRUMENT ALTIMETER DIRECTIVE | 11/23/1974 |
| ME74-20 | | en | AIR CONDITIONING SYSTEM COMPONENT IMPROVEMENTS AND MAINTENANCE GUIDE | 12/13/1974 |
| ME75-1 | | en | WINDSHIELD ANTI-ICE ASSEMBLY INSPECTION | 01/17/1975 |
| ME75-2 | | en | CABIN DOOR SAFETY LOCK IMPROVEMENTS | 01/24/1975 |
| ME75-3 | | en | CABIN NOISE REDUCTION | 01/28/1975 |
| ME75-4 | | en | BATTERY AND BATTERY BOX MAINTENANCE | 02/14/1975 |
| ME75-5 | | en | IMPROVED FUEL LINE SUPPORT | 02/18/1975 |
| ME75-6 | | en | MANIFOLD DRAIN HOSE INSPECTION; WATER ACCUMULATION - VACUUM SYSTEM AIR FILTER... | 02/28/1975 |
| ME75-10 | | en | BRAKE MASTER CYLINDER PISTON INSPECTION | 04/25/1975 |
| ME75-11 | | en | TURBOCHARGER OIL INLET ADAPTER AND FITTING IMPROVEMENT | 05/02/1975 |
| ME75-12 | | en | MCCAULEY GOVERNOR REPLACEMENT | 05/16/1975 |
| ME75-13 | | en | OIL COOLER FLANGE IMPROVEMENT; PITOT TO AIRSPEED INDICATOR HOSE CLAMPING; ELEVATOR SKIN REPAIR | 05/30/1975 |
| ME75-14 | | en | SURFACE DEICE VACUUM MANIFOLD CONNECTIONS | 07/11/1975 |
| ME75-21 | | en | IMPROVED AFT SLIP JOINT SEALS | 08/29/1975 |
| ME75-25 | | en | | 09/26/1975 |
| ME76-1 | | en | | 01/05/1976 |
| ME76-3 | | en | FRONT WING SPAR INSPECTION | 01/09/1976 |
| ME76-4 | | en | MAIN LANDING GEAR DOWN LOCK PIN AND SET SCREW INSPECTION | 01/23/1976 |
| ME76-9 | | en | IMPROVED POWERPLANT CONTROL CABLES | 04/19/1976 |
| ME76-12 | | en | CHANGE #1 TO THE 1976 MODEL 310R, TURBO 310R, 340A, 402B and 414 PILOT'S OPERATING HANDBOOKS | 05/10/1976 |
| ME76-15 | | en | TROUBLESHOOTING FOR ENGINE ROUGHNESS | 09/13/1976 |
| ME76-17 | | en | | 08/16/1976 |
| ME76-21 | 1 | en | AILERON PULLEY BRACKET INSPECTION | 11/08/1976 |
| ME76-24 | | en | | 12/23/1976 |
| ME77-2 | | en | NOSE WHEEL FENDER ATTACH BOLT/TUBE STEM CLEARANCE INSPECTION | 02/14/1977 |
| ME77-6 | | en | LOWER WING SKIN/FRONT SPAR RIVETS | 03/21/1977 |
| ME77-7 | | en | | 03/21/1977 |
| ME77-8 | | en | | 03/28/1977 |
| ME77-12 | | en | NOSE WHEEL WELL MODIFICATION | 05/02/1977 |
| ME77-14 | | en | EQUIPMENT LIST CORRECTIONS | 05/30/1977 |
| ME77-15 | | en | ADJUSTABLE SEAT MODIFICATION | 06/06/1977 |
| ME77-16 | | en | PILOTS OPERATING HANDBOOK CHANGES FOR 1976 and 1977 Model 421C and 1977 Model 404 | 06/13/1977 |
| ME77-24 | | en | LANDING GEAR WARNING SWITCH MODIFICATION; PILOT'S CHECK LIST | 08/15/1977 |
| ME77-28 | | en | TITAN CARE | 10/01/1977 |
| ME77-29 | | en | POWER APPROACH PLACARD AND OWNERS MANUAL REVISION | 10/24/1977 |
| ME77-31 | | en | MODEL 340A ELEVATOR AND HORIZONTAL STABILIZER IMPROVEMENTS | 10/31/1977 |
| ME77-32 | | en | STROBE LIGHT FLASHER CHOKE ASSEMBLY REPLACEMENT | 12/23/1977 |
| ME78-5 | | en | HI-LOK FASTENERS | 02/20/1978 |
| ME78-6 | | en | RUBBER FUEL TANK PRORATA ADJUSTMENT | 03/13/1978 |
| ME78-7 | | en | FUEL TANK INSPECTION | 03/13/1978 |
| ME78-24 | | en | IMPROVED TAILCONE DRAINAGE 400 SERIES AIRCRAFT | 07/24/1978 |
| ME78-29 | 1 | en | IN-LINE AUXILIARY FUEL PUMP | 11/13/1978 |
| ME78-47 | 1 | en | IMPROVED FUEL CAPS MODEL 336 AND 337 | 02/12/1979 |
| ME78-47 | 2 | en | VENTED FUEL CAPS | 09/28/1979 |
