Service Letter SL-550| Name | Revision | Lang | Subject | Date |
|---|
| SL550-05-11 | | en | NEW PHASE 5 INSPECTION PROGRAM | 09/01/1999 |
| SL550-21-10 | | en | MINI-CONTROLLER SOLENOID HEAT DAMAGE | 09/01/1980 |
| SL550-23-6 | 1 | en | Avtech Audio Amp--Installation of Increased Voltage Capacitors | 12/17/1982 |
| SL550-23-7 | 1 | en | Mandatory Sundstrand Data Control, Inc. Service Bulletin No. 012-0296-109. | 11/30/1984 |
| SL550-23-18 | | en | COMMUNICATIONS - COCKPIT VOICE RECORDER IMPROVE RELIABILITY OF SELF-TEST CIRCUITRY, IMPROVE POWER MONITOR | 09/01/1992 |
| SL550-23-31 | 1 | en | COMMUNICATIONS - AIRSHOW RELIABILITY IMPROVEMENTS AND SERVICE PACK SOFTWARE UPGRADE | 03/11/2003 |
| SL550-24-11 | | en | ELECTRICAL POWER - GENERATOR CONTROL UNIT IMPROVEMENT | 04/12/1991 |
| SL550-25-1 | 1 | en | Emergency REVISED PASSENGER SAFETY BRIEFING CHARTS | 04/11/1980 |
| SL550-27-08 | | en | FLIGHT CONTROLS - TRIM ACTUATOR CHAIN SPROCKET RETENTION SCREWS | 11/11/1988 |
| SL550-29-10 | | en | HYDRAULIC POWER - HYDRAULIC FITTING INSPECTION | 07/31/2003 |
| SL550-30-06 | | en | Mandatory | 05/15/2003 |
| SL550-30-1 | 1 | en | NOSE AREA WATER LEAKS | 07/18/1980 |
| SL550-30-2 | 1 | en | Erosion shoes for the wing tip, pylon leading edge, horizontal stabilizer tips and vertical fin tip. | 01/06/1984 |
| SL550-32-8 | | en | NOSE GEAR SCRAPER RING | 06/20/1980 |
| SL550-32-31 | | en | LANDING GEAR - UPLOCK ACTUATOR HYDRAULIC LINE INSPECTION | 02/24/1989 |
| SL550-32-37 | | en | LANDING GEAR - FLUORESCENT AND DYE PENETRANT INSPECTION PROCEDURAL CHANGE FOR BFGOODRICH WHEELS AND BRAKES | 12/08/1989 |
| SL550-32-47 | | en | LANDING GEAR - ANTI-SKID SYSTEM CONTROL UNIT CALIBRATION VERIFICATION | 01/18/1991 |
| SL550-32-70 | | en | LANDING GEAR - TRANSMITTAL OF BFGOODRICH SERVICE LETTER SL1 728, LANDING GEAR - NOSE WHEEL BALANCE WEIGHT FASTENER PLACEMENT | 10/18/1996 |
| SL550-32-86 | 1 | en | LANDING GEAR - TRAILING LINK FORWARD BORE CORROSION PROTECTION | 08/08/2012 |
| SL550-34-10 | | en | Modification of Battery Charging Card P/N 11745-1 | 05/17/1982 |
| SL550-34-15 | | en | Mandatory Alert Emergency | 07/16/1982 |
| SL550-34-16 | | en | Flight Director - Back Course Limitation | 08/16/1982 |
| SL550-34-29 | | en | NAVIGATION - ADF ANTENNA SPACER INSTALLATION | 01/04/1993 |
| SL550-34-36 | | en | NAVIGATION - B-RNAV OPERATION NAVIGATION SYSTEM APPROVAL | 07/27/1998 |
| SL550-34-58 | | en | NAVIGATION - TRANSMITTAL - HONEYWELL SERVICE INFORMATION LETTER DU-870 DRY OUT PROCEDURES | 06/29/2010 |
| SL550-53-03 | | en | FUSELAGE - LIGHTNING DIVERTER STRIP INSTALLATION/REPAIR PROCEDURE CHANGE (RADOME) | 08/23/2001 |
| SL550-53-2 | 1 | en | Mandatory Emergency Tailcone Skin Interference with Vertical Fin Spar Inspection | 09/30/1985 |
| SL550-71-08 | | en | POWER PLANT - LOWER ENGINE COWLING DRAIN HOLE INSTALLATION | 07/01/1999 |
| SL550-73-06 | 2 | en | ENGINE FUEL AND CONTROL - TRANSMITTAL OF PRATT & WHITNEY CANADA (P&WC) SERVICE BULLETIN 30197, TURBOFAN ENGINE NEW FUEL MANIFOLD - INTRODUCTION OF | 04/19/2007 |
| SL550-76-3 | | en | Mandatory REACTIVATION OF THE ENGINE SYNCHRONIZER SYSTEM | 07/07/1980 |
| SL550-79-2 | | en | Engine Oil Change Calendar Time Limit Increase | 09/23/1982 |
