REVISION TRANSMITTAL This sheet transmits Revision 1 to, which: A. Adds HDWR kit to the MATERIAL INFORMATION section. NOTE: This revision replaces the original issue of in its entirety. REVISION COMPLIANCE INFORMATIONAL. Airplanes previously modified by the original issue of this service bulletin are not affected by this revision. LOG OF REVISIONS Original Issue September 28, 2015 Revision 1 May 20, 2016 Original Issue - September 28, 2015 Revision 1 - May 20, 2016 Page 1 of 1 Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800 COPYRIGHT 2015
TITLE FUSELAGE - AFT CANTED BULKHEAD MODIFICATION EFFECTIVITY MODEL SERIAL NUMBERS 680 (Citation Sovereign) -0001, -0002, -0006, -0025, -0030, -0031, -0032, -0046, -0051, -0057, -0064, -0066, -0067, -0082, -0104, -0108, -0112, -0118, -0120, -0125, -0132, -0139, -0140, -0141, -0144, -0147, -0148, -0149, -0153, -0157, -0160, -0162, -0163, -0164, -0166, -0167, -0169, -0170, -0171, -0173, -0174, -0175, -0176, -0177, -0178, -0179, -0180, -0182, -0183, -0185, -0186, -0192, -0193, -0196, -0200, -0202, -0204, -0205, -0206, -0208, -0211, -0216, -0220, -0221, -0222, -0227, -0229, -0230, -0231, -0234, -0235, -0236, -0238, -0241, -0242, -0243, -0245, -0246, -0249, -0252, -0253, -0255, -0256, -0257, -0258, -0260, -0262, -0268, -0270, -0271, -0280, -0282, -0283, -0284, -0285, -0289, -0291, -0292, -0296, -0297, -0300, -0301, -0302, -0303, -0304, -0306, -0307, -0313, -0315, -0317, -0318, -0322, -0323, -0324, -0327, -0328, -0329, -0333, -0334, -0336, -0337, -0339, -0340, -0342, -0344, -0346, -0347, -0348, -0349 680 (Citation Sovereign+) -0501, -0504, -0505, -0509, -0510, -0511, -0512, -0513, -0514, -0515, -0516, -0517, -0519, -0520, -0522, -0524, -0525, -0526, -0527, -0531 REASON NOTE: Cessna-owned Citation Service Centers are the only facilities that can complete this service bulletin. NOTE: All aircraft listed in the EFFECTIVITY must complete this bulletin within the COMPLIANCE statement time limits. To add additional stiffeners to the Aft Canted Bulkhead. DESCRIPTION This service bulletin provides parts and instructions to add stiffeners to the aft canted bulkhead. NOTE: It is recommended that the technician preview the video to get an overview of the work to be completed prior to the start of the modification. Original Issue - September 28, 2015 Revision 1 - May 20, 2016 Page 1 of 6 Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800 This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991 COPYRIGHT 2015
COMPLIANCE MANDATORY. This service bulletin must be accomplished as follows: For aircraft with 7000 or more flights hours at the time of receipt, this service bulletin must be accomplished within 1800 flight hours or 24 months whichever occurs first, from the date of receipt. For aircraft below 7000 hours at the time of receipt, this service bulletin must be accomplished within 3600 flight hours or 4 years, whichever occurs first, from the date of receipt. It is recommended to accomplish this service bulletin at the next Inspection Document 9. NOTE: All aircraft listed in the EFFECTIVITY must complete this bulletin within the COMPLIANCE statement time limits. NOTE: Accomplishment of this bulletin eliminates the repetitive inspections that are required by SL680-53-05 Aft Canted Bulkhead Inspection (Revision 2 or later). A service bulletin published by Cessna Aircraft Company may be recorded as "completed" in an aircraft log only when the following requirements are satisfied: 1) The mechanic must complete all of the instructions in the service bulletin, including the intent therein. 2) The mechanic must correctly use and install all applicable parts supplied with the service bulletin kit. Only with written authorization from Cessna Aircraft Company can substitute parts or rebuilt parts be used to replace new parts. 3) The mechanic or airplane owner must use the technical data in the service bulletin only as approved and published. 4) The mechanic or airplane owner must apply the information in the service bulletin only to aircraft serial numbers identified in the "Effectivity" section of the bulletin. 5) The mechanic or airplane owner must use maintenance practices that are identified as acceptable standard practices in the aviation industry and governmental regulations. No individual or corporate organization other than Cessna Aircraft Company is authorized to make or apply any changes to a Cessna-issued service bulletin, service letter, or flight manual supplement without prior written consent from Cessna Aircraft Company. Cessna Aircraft Company is not responsible for the quality of maintenance performed to comply with this document, unless the maintenance is accomplished at a Cessna-owned Citation Service Center. APPROVAL Cessna received FAA approval for the technical data in this publication that changes the airplane type design. Page 2 Revision 1 - May 20, 2016
CONSUMABLE MATERIAL You must use the consumable materials that follow, or their equivalent, to complete this service bulletin. NAME NUMBER MANUFACTURER USE Color Chemical Film U074093 Corrosion Resistant Primer Textron Aviation Parts Distribution 7121 Southwest Boulevard Wichita, KS 67215 To prepare aluminum surface for intermediate primer. K000574 Textron Aviation Parts Distribution Final finish for aluminum. Sealant (Type X) U544067S Textron Aviation Parts Distribution To shank seal fasteners. Adhesive U000701, Type I, Class B (9309) Type IV Sealant (Firewall Sealant) Textron Aviation Parts Distribution For fay sealing applications. U000117S Textron Aviation Parts Distribution To seal the APU firewall. WEIGHT AND BALANCE INFORMATION MODEL 680 WEIGHT CHANGE RESULTANT MOMENT MOMENT/100 +6.49 pounds +4500.40 inch-pounds +45.00 inch-pounds REFERENCES Cessna Model 680 Maintenance Manual NOTE: To install the Aft Canted Bulkhead Modification on your airplane, you must get the engineering documents that follow. You must use the most recent revision and all of the applicable drawing change notices (DCN) for each engineering document. DOCUMENT NUMBER AFT CANTED BULKHEAD MODIFICATION ENGINEERING DRAWING LIST TITLE 6991115 Aft Canted Bulkhead Mod For an overview video of this modification, access the QR code or use the URL address that follows: Select this link: http://textron.vo.llnwd.net/o25/ces/customerservice/ex/ex.html NOTE: For Cessna Citation Service Center Technicians, there is a video on the technicians home page that provides a more in depth review of the modification procedures. From the Service Center terminal, go to: http://textron.vo.llnwd.net/o25/ces/customerservice//.html PUBLICATIONS AFFECTED Cessna Model 680 Illustrated Parts Catalog ACCOMPLISHMENT INSTRUCTIONS 1. Prepare the airplane for maintenance. A. Make sure that the airplane is electrically grounded. Revision 1 - May 20, 2016 Page 3
B. Make sure that all switches are in the OFF/NORM position. C. Disconnect electrical power from the airplane. (1) Disconnect the airplane batteries. (2) Disconnect external electrical power. D. Attach maintenance warning tags to the batteries and external power receptacle that have "DO NOT CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them. E. Make sure the tail stand is in position under the tail of the airplane. F. Open the tailcone maintenance door to access to the forward side of the aft canted bulkhead. 2. Remove the APU. (Refer to the Maintenance Manual, Chapter 49, Auxiliary Power Unit Power Plant - Maintenance Practices.) A. After the APU is removed, remove access panels 330ABC, and 330CBC. (Refer to the Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.) NOTE: After the APU is removed, it is acceptable to have all three APU access panels removed from the airplane at the same time. 3. Remove the rudder fairing panel 342AB. (Refer to the Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.) A. Disconnect the tailcone electrical connector PT070. 4. Remove the APU truss assembly. (Refer to the Maintenance Manual, Chapter 49, Auxiliary Power Unit Power Plant - Maintenance Practices.) 5. Disconnect all components common to the APU heat shield. NOTE: The video has additional information that may be helpful with understanding the components that need to be disconnected. Some of the components are the Firewall Pan Down Tube, Bleed Air line, APU Power and Ground Wire Bundle Assembly, APU Fire Detect and JT076 Connectors, APU Fuel Supply Line, and the Fire Extinguisher Line. 6. Remove the stinger. 7. Remove the APU heat sheild. NOTE: The video has additional information that may be helpful with understanding the removal process for the APU heat shield. 8. Complete the 6991115-1 Aft Canted Bulkhead Modification. (Refer to Cessna Engineering drawing 6991115.) 9. Install the APU Heat Sheild. 10. Connect all components common to the APU heat shield that were disconnected when the heat shield was removed. 11. Seal the APU heat shield with Type IV firewall sealant. 12. Install the stinger and rudder fairing panel 342AB. (Refer to the Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.) A. Connect the tailcone electrical connector PT070. 13. Install the APU truss assembly. (Refer to the Maintenance Manual, Chapter 49, Auxiliary Power Unit Power Plant - Maintenance Practices.) 14. Install access panels 330ABC and 330CBC. (Refer to the Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.) 15. Install the APU. (Refer to the Maintenance Manual, Chapter 49, Auxiliary Power Unit Power Plant - Maintenance Practices.) Page 4 Revision 1 - May 20, 2016
16. If not already installed during the APU installation, install access panels 330ABC, 330CBC, and 330BBC. (Refer to the Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.) 17. Close the tailcone maintenance door. 18. Remove the maintenance warning tags and connect the airplane batteries. 19. Complete an operational check of all removed and disconnected equipment. (Refer to the applicable Chapter in the Model 680 Maintenance Manual.) 20. Record that this service bulletin has been completed. A. Complete a Maintenance Transaction Report. B. Put a copy of the completed Maintenance Transaction Report in the airplane logbook. C. Send a copy of the completed Maintenance Transaction Report to: CESCOM C/O Camp Systems International Incorporated, 8201 East 34th Street North, Building 1100 Suite 1101 Wichita, KS 67226. MATERIAL INFORMATION NOTE: All driven and/or pulled rivets necessary to accomplish this service bulletin have been excluded from the material information section and will be installed at the service center. Order the kit below to install this modification. NEW P/N QUAN- TITY 1 Kit, consisting of the following parts: KEY WORD OLD P/N INSTRUCTIONS/ DISPOSITION 6991115-3 1 Upper Angle, Left None Install 6991115-4 1 Upper Angle, Right None Install 6991115-5 1 Mid Angle, Left None Install 6991115-6 1 Mid Angle, Right None Install 6991115-7 1 Lower Angle, Left None Install 6991115-8 1 Lower Angle, Right None Install 6991115-9 2 Radius Filler None Install 6991115-10 2 Radius Filler None Install 6991115-11 2 Radius Filler None Install 6991115-12 1 Anchor N/A Install 1 Instructions Revision 1 - May 20, 2016 Page 5
NOTE: In addition to the kit, you must order the hardware kit that follows. NEW P/N QUANTITY KEY WORD OLD P/N INSTRUCTIONS/ DISPOSITION HDWR 1 Hardware Kit, consisting of the following parts: HL10VBJ5-3 28 Pin None Install HL10VBJ-5-4 6 Pin None Install HL10VBJ6-10 12 Pin None Install HL10VBJ6-2 4 Pin None Install HL10VBJ6-3 4 Pin None Install HL10VBJ-6-4 92 Pin None Install HL10VBJ6-5 67 Pin None Install HL10VBJ6-6 6 Pin None Install HL10VBJ6-7 20 Pin None Install HL10VBJ6-8 8 Pin None Install HL20PB-8-15 10 Pin None Install HL70-5 34 Collar None Install HL70-6 213 Collar None Install HL86-8 10 Collar None Install Page 6 Revision 1 - May 20, 2016
OWNER ADVISORY TITLE FUSELAGE - AFT CANTED BULKHEAD MODIFICATION TO: REASON Cessna Aircraft Owner To add additional stiffeners to the Aft Canted Bulkhead. COMPLIANCE MANDATORY. This service bulletin must be accomplished as follows: For aircraft with 7000 or more flights hours at the time of receipt, this service bulletin must be accomplished within 1800 flight hours or 24 months whichever occurs first, from the date of receipt. For aircraft below 7000 hours at the time of receipt, this service bulletin must be accomplished within 3600 flight hours or 4 years, whichever occurs first, from the date of receipt. It is recommended to accomplish this service bulletin at the next Inspection Document 9. NOTE: All aircraft listed in the EFFECTIVITY must complete this bulletin within the COMPLIANCE statement time limits. NOTE: Accomplishment of this bulletin eliminates the repetitive inspections that are required by SL680-53-05 Aft Canted Bulkhead Inspection (Revision 2 or later). A service bulletin published by Cessna Aircraft Company may be recorded as "completed" in an aircraft log only when the following requirements are satisfied: LABOR HOURS WORK PHASE MATERIAL AVAILABILITY MAN-HOURS Modification 180 PART NUMBER AVAILABILITY COST * * HDWR * * * Please contact Textron Aviation Parts Distribution for current cost and availability of parts listed in this service bulletin. Phone at 1-800-835-4000 (Domestic) or 1-316-517-7542 (International). Send email to: dirop@txtav.com or telefax at 1-316-517-7711. Based on availability and lead times, parts may require advanced scheduling. Original Issue - September 28, 2015 Revision 1 - May 20, 2016 Page 1 of 2 Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800 This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991 COPYRIGHT 2015
OWNER ADVISORY WARRANTY This bulletin is Mandatory. Eligible airplanes may qualify for parts and labor coverage, as described below. Eligibility: Parts Coverage: Labor Coverage: Credit Application: All Citations identified within the serial number effectivity of this service bulletin. Cessna-owned Citation Service Centers may submit a Citation Claim Form for the parts required to accomplish this bulletin. Cessna-owned Citation Service Centers may submit a Citation Claim Form for the labor necessary to accomplish this service bulletin. Please note Labor Hours Requirements for coverage guidelines. All work must be completed and the Citation Claim Form submitted before the date shown below. Send the Citation Claim Form, along with any required parts (see Material Availability), to the point of purchase. Parts to be returned to Textron Aviation Parts Distribution should be forwarded to: Textron Aviation Parts Distribution Warranty Administration 7121 Southwest Boulevard Wichita, KS USA 67215 Expiration: December 31, 2019 For an overview video of this modification, access the QR code or use the URL address that follows: http://textron.vo.llnwd.net/o25/ces/customerservice/ex/ex.html NOTE: As a convenience, service documents are now available online to all our customers through a simple, free-of-charge registration process. If you would like to sign up, please visit the "Customer Access" link at www.txtavsupport.com to register. Page 2 Revision 1 - May 20, 2016