Service Bulletin SB-550-52| Name | Revision | Lang | Subject | Date |
|---|
| 550-52-4 | | en | DOORS - WIDE DOOR IMPROVEMENTS | 09/09/1983 |
| 550-52-5 | | en | DOORS - WIDE DOOR THIRD STEP INSTALLATION | 01/27/1984 |
| SB 550-52-1 | | en | DOOR STEP SUPPORT CHAIN ATTACHING MODIFICATION | 11/14/1978 |
| SB550-52-6 | | en | Mandatory DOORS - WIDE DOOR WARNING SWITCH WIRING MODIFICATION | 03/16/1984 |
| SB550-52-8 | | en | DOORS - WIDE DOOR SEAL VALVE HEATING MODIFICATION | 11/09/1984 |
| SB550-52-9 | 1 | en | DOORS - WIDE DOOR SEAL ACTUATOR LINKAGE MODIFICATION | 05/31/1985 |
| SB550-52-11 | | en | Mandatory DOORS - WIDE DOOR UPPER HINGE ATTACHMENT INSPECTION/MODIFICATION | 09/24/1985 |
| SB550-52-12 | | en | DOORS - WIDE DOOR IMPROVEMENTS | 11/11/1985 |
| SB550-52-15 | 1 | en | Mandatory DOORS - WIDE DOOR WINDOW DOUBLER INSPECTION/INSTALLATION | 02/14/1986 |
| SB550-52-16 | 1 | en | DOORS - WIDE DOOR INSTALLATION | 02/20/1987 |
| SB550-52-21 | 1 | en | DOORS - WIDE DOOR RETRACT CABLE MODIFICATION | 04/01/1993 |
| SB550-52-28 | | en | DOORS - CABIN DOOR STEP HANDLE AND DRAIN HOLE INSTALLATION | 03/20/1998 |
| SB550-52-29 | | en | DOORS - RATE CONTROL STEP ASSEMBLY | 03/20/1998 |
| SB550-52-30 | | en | DOORS - RTM CABIN DOOR STEP ASSEMBLY INSTALLATION | 01/04/1999 |
| SB550-52-31 | | en | DOORS - WIDE DOOR MODIFICATION | 12/11/1998 |
| SB550-52-33 | 1 | en | DOORS - RAIN GUTTER FASTENER INSPECTION/REPLACEMENT | 01/23/2001 |
| SB550-52-36 | 1 | en | DOORS - ENTRY DOOR CABLE REPLACEMENT | 03/06/2003 |
| SB550-52-38 | 1 | en | DOORS - IMPROVEMENT FOR THE CABIN ENTRY STEPS | 11/27/2007 |
| SB550-52-39 | | en | DOORS - WIDE DOOR MODIFICATION | 04/05/2007 |
