# Dassault Service Bulletin F900-460: Revision 1 - Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2017-0909; AD 2018-05-05 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Dassault Service Bulletin F900-460](https://openairdocs.org/service-documents/dassault/f900-460.md) - Title as filed: SB F900-460 R1 - Pages: 15 - PDF: https://openairdocs.org/files/sha256/77/1e/771e8717e4e301b74339ad0a96c6b3eb4d5d79a07af4d136e529485770e5960e - Page: https://openairdocs.org/service-documents/dassault/f900-460/file/771e8717e4e3 ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 FALCON 900 No 460-R1 FEBRUARY 10, 2017 ATA 57-14 WINGS SLATS SLAT TRACKS #6 #7 #8 - "EXTENSION" MECHANICAL STOP INSPECTION FALCON SERVICE BULLETIN Copyright © 2017 by Dassault Aviation All rights reserved. No part of this work may be reproduced or copied in any form or by any means without written permission of Dassault Aviation. 447 ### Page 2 WINGS SLATS SLAT TRACKS #6 #7 #8 - "EXTENSION" MECHANICAL STOP INSPECTION Initial issuance September 13, 2016 List of effective pages : 1 to 11 Revision 1 February 10, 2017 List of effective pages : 1 to 11 List of modified pages : 1, 2, 4, 5, 7, 8, 9 and 11 REASON:Paragraphs deleted and replaced with references to corresponding tasks. This revision is not applicable to aircraft that have already implemented the initial issuance of this Service bulletin. FALCON 900 F900 -460 F900 -57-14 ### Page 3 WINGS SLATS SLAT TRACKS #6 #7 #8 - "EXTENSION" MECHANICAL STOP INSPECTION 1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to F900 aircraft with serial numbers 79, 85, 154, 159, 160. B. REASON On some aircraft in-service, the screw of the slat mechanical stop assembly on slat tracks #6, #7 and #8 was found loose. This situation caused some structural damage to the wing front spar and, in a few cases, a puncture in the fuel cap, leading to fuel leakage. An improper installation of the lockwashers on the screws is suspected. The purpose of this Service Bulletin is to verify the proper installation of the screws and to re-install them if necessary. C. DESCRIPTION This Service Bulletin consists in: • Verifying the tightening of the screw and the proper lockwasher installation at the slat tracks #6, #7 and #8, • Replacing and re-installing the screw lockwashers, if needed. D. COMPLIANCE If you choose to comply with this Service Bulletin, accomplishment is to be performed during the next “9M or 440FH” inspection. E. APPROVAL The technical content of this document is approved under the authority of DOA nr. EASA.21J.051. F. LABOR Estimated labor-hours: Refer to Service Bulletin Commercial Summary. NOTE: These labor-hours only concern the work described in this Service Bulletin and do not include other maintenance work that may be performed on this occasion. G. MATERIAL - PRICE AND AVAILABILITY The modification kit may be obtained from either address listed below: Western hemisphere: DASSAULT FALCON JET CORP. SPARES DISTRIBUTION CENTER 200 RISER ROAD LITTLE FERRY, NJ 07643 U.S.A. FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 1 / 11 DASSAULT AVIATION Proprietary Data ### Page 4 Telephone: • CANADA and U.S.A.: 1-800-800-4036 • MEXICO: 001-800-800-4036 • Other countries: 1-201-541-4809 Fax: • CANADA and U.S.A.: 1-800-800-4817 • MEXICO: 001-800-800-4817 • Other countries: 1-201-440-7021 Other continents: DASSAULT AVIATION Falcon Spares BOITE POSTALE N°101 AEROPORT DU BOURGET 93350 - LE BOURGET Cedex (FRANCE) Please contact your Dassault Aviation Account Representative Telephone: 33 (0)1.48.35.56.78 Fax: 33 (0)1.48.35.56.00 E/H dafsorder@dassault-aviation.com Price and availability on request. H. TOOLING - PRICE AND AVAILABILITY Normal maintenance tooling. slat stop on rail No.7 adjustment wrench (TF50B27019) Guide (TF50B27020-6) from slat adjustment tools (TF50B27020) or small locally-made tool (Refer to TASK 57-45-13-900-801) I. WEIGHT AND BALANCE Change in weight: None. Change in balance with respect to 25% MAC: None. J. REFERENCES Aircraft Maintenance Manual: • GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801) • ENERGIZATION / DE-ENERGIZATION OF THE AIRCRAFT (Refer to TASK 24-00-00-860-801) • FLIGHT CONTROL SYSTEM MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 27-00-00-910-801) • EXTENSION / RETRACTION OF THE SLATS / FLAPS FOR MAINTENANCE (Refer to TASK 27-50-00-860-802) • REPLACEMENT / ADJUSTMENT OF THE OUTBOARD SLAT POSITION MICROSWITCHES (Refer to TASK 27-80-17-960-801) • PRESSURIZATION / DE-PRESSURIZATION OF THE HYDRAULIC SYSTEMS (Refer to TASK 29-00-00-860-801) • REMOVAL / INSTALLATION OF THE OUTBOARD SLATS (Refer to TASK 57-45-13-900-801) FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 2 / 11 DASSAULT AVIATION Proprietary Data ### Page 5 K. OTHER PUBLICATIONS AFFECTED The following publications will be revised at a later date to account for the changes introduced by this Service Bulletin: • Maintenance Manual. FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 3 / 11 DASSAULT AVIATION Proprietary Data ### Page 6 2. ACCOMPLISHMENT INSTRUCTIONS A. PRELIMINARY STEPS (1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801). (2) Obey the flight control system maintenance and safety precautions (Refer to TASK 27-00-00-910-801). (3) Remove the wing lower surface outboard leading edge access panel No. 3 (522CB) and (622CB) to gain access to the mechanical stops, at LH/RH slat track #7. (4) Fully extend the slats in normal mode (Refer to TASK 27-50-00-860-802 , paragraph "Extension in normal mode"). (5) Cut off and drop the pressure in hydraulic systems 1 and 2 (Refer to TASK 29-00-00-860-801 , paragraph "cut off and drop the pressure from Hydraulic Ground Power Unit"). (6) De-energize the aircraft systems (Refer to TASK 24-00-00-860-801 , paragraph "De-energization with the Electrical Ground Power Unit") (7) Inhibit slat deflection (Refer to TASK 27-50-00-860-802 , paragraph "Operation on slats or flaps extended"). B. PROCEDURE (1) Inspection of LH/RH slat track #7 NOTE: This procedure is given for the slat "EXTENDED" stop, at LH outboard slat. The same procedure is applicable for the slat "EXTENDED" stop, at RH outboard slat. (a) Remove the slat extended microswitch (L16CM)/(R16CM) / support assembly (a-fig. 1 ), without electrical disconnection (Refer to TASK 57-45-13-900-801 , paragraph "REMOVAL"). (b) Check the screw ( c-fig. 1) and the lockwasher (d-fig. 1) for correct installation: Refer to fig. 1 and fig. 2 1 Make sure that the white marks on the screw head (c-fig. 1 ) and on the slat "EXTENDED" stop (e-fig. 1 ) are still aligned (no untightening occurred since first installation). 2 Make sure that the lockwasher tabs are in contact and flush with the screw (c-fig. 1) on the one hand and with the slat "EXTENDED" stop (e-fig. 1) on the other hand. 3 Check manually the tightening of the screw head ( c-fig. 1). 4 Record the result of the inspection in the "INSPECTION REPORT" ( fig. 4) and email it to CommandCenter@dassault-aviation.com. (c) If the screw and lockwasher installation is compliant (refer to photo 1 and 2 fig. 2), install the slat extended microswitch (L16CM)/(R16CM) / support assembly (Refer to TASK 57-45-13-900-801 , paragraph "INSTALLATION"). (d) If the screw and lockwasher installation is not compliant, continue the procedure. FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 4 / 11 DASSAULT AVIATION Proprietary Data ### Page 7 (e) Remove the slat "EXTENDED" stop (e-fig. 1 ) from track #7 (Refer to TASK 57-45-13-900-801 , paragraph "REMOVAL"). (f) Install the slat "EXTENDED" stop (e-fig. 1) on track #7: Refer to fig. 1 and fig. 2 CAUTION: RESPECT THE ORIENTATION OF LOCKWASHER FOR RH WING (REFER TO PHOTO 1, FIG. 2). ¨ 1 Install and fold the tabs of the new lockwasher (d-fig. 1) in accordance with photo 1 fig. 2. CAUTION: DO NOT APPLY MOLYKOTE DX ON SCREW THREAD. 2 Install the slat "EXTENDED" stop (e-fig. 1 ) (Refer to TASK 57-45-13-900-801 , paragraph "INSTALLATION"). (g) Install the slat extended microswitch (L16CM)/(R16CM) / support assembly (a-fig. 1) (Refer to TASK 57-45-13-900-801 , paragraph "INSTALLATION"). (2) Inspection of LH/RH slat tracks #6 and #8 (Refer to TASK 57-45-13-900-801). Refer to fig. 3 (a) Check the screw and the lockwasher for correct installation: 1 Make sure that the white marks on the screw head and on the slat track are still aligned (no untightening occurred since first installation). 2 Make sure that the lockwasher tabs are in contact and flush with the screw on the one hand and with the slat track on the other hand. 3 Check manually the tightening of the screw head. (b) If the screw and lockwasher installation is compliant, record the result of the inspection in the "INSPECTION REPORT" (fig. 4) and no further action required. (c) If the screw and lockwasher installation is not compliant, replace the lockwasher (Refer to TASK 57-45-13-900-801). C. TESTS (1) Check the mechanism of the slat extended microswitch (L16CM)/(R16CM) (Refer to TASK 27-80-17-960-801 , paragraph "Ajustment/Test of Outboard Slat Extended Position Microswitch"). (2) Test the slat extended microswitch (L16CM)/(R16CM) (Refer to TASK 27-80-17-960-801 , paragraph "Test After Installation of Outboard Slat Extended Microswitch"). D. FINAL STEPS (1) Disconnect the electrical GPU (Refer to TASK 24-00-00-860-801 , paragraph "Disconnection of the Electrical Ground Power Unit"). (2) Disconnect the hydraulic GPU (Refer to TASK 29-00-00-860-801 , paragraph "Disconnection of the Hydraulic Ground Power Unit"). (3) Install the wing lower surface outboard leading edge access panel No. 3 ( 522CB) and (622CB). FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 5 / 11 DASSAULT AVIATION Proprietary Data ### Page 8 E. RECORDING Record compliance with this Service Bulletin in the appropriate aircraft documents. Fill out the card located at the end of the Service Bulletin and mail or fax it to Dassault Aviation or Dassault Falcon Jet, or fill out the electronic Service Bulletin reply form located in the ”Service Bulletin" page on the Falcon portal. FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 6 / 11 DASSAULT AVIATION Proprietary Data ### Page 9 3. MATERIAL INFORMATION NOTE: Compliance with this Service Bulletin by substituting the part numbers below with interchangeable subsequent part numbers (as per Master List) is acceptable, provided the subsequent part numbers have the same effectivity as the original ones. A. MODIFICATION KIT Kit P/N SBF2000X0386B NEW P/N QTY KEY WORD INSTRUCTIONS DISPOSITION ITEM FIG 33340CA063 2 Lockwasher For Track #7 (d-fig. 1) HW17-4DF 2 Self-locking nut For Track #7 (f-fig. 1) 33340CA079 4 Lockwasher For Tracks #6 and #8 B. LOCAL PROCUREMENT As indicated in Consumable Products Manual (CPM): • Tyrap (P/N: 78750-02) (as required) • molykote DX FALCON 900 F900 -460 February 10, 2017 F900 -57-14 Revision 1 Page 7 / 11 DASSAULT AVIATION Proprietary Data ### Page 10 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 900 F900 -460 slat "EXTENDED" stops : see detail A RIB 7 Track #7 - LH Wing - Track #7 microswitch mechanical stop Figure 1: SLAT "EXTENDED" STOP - REMOVAL/INSTALLATION February 10, 2017 F900 -57-14 Revision 1 Page 8 / 11 ### Page 11 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 900 F900 -460 slat "EXTENDED" stops: see photos below RIB 7 Track #7 - LH Wing - Respect the lockwasher orientation Fully fold this tab against stop Fully fold these tabs against screw head Apply white paint on screw head Photo 1 Compliant installation slat "EXTENDED" stops: see photo below Apply white paint on screw head RIB 7 Track #7 - RH Wing - Respect the lockwasher orientation Photo 2 Figure 2: TRACK #7 - LOCKWASHER INSTALLATION February 10, 2017 F900 -57-14 Revision 1 Page 9 / 11 ### Page 12 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 900 F900 -460 RIB 7 Track #8 Track #6 - LH Wing - 979 Apply white paint on screw head Respect the lockwasher orientation Photo 1 Track #6 and #8 RIB 7 Track #8 Track #6 - RH Wing - Apply white paint on screw head Respect the lockwasher orientation Photo 2 Track #6 and #8 Figure 3: TRACK #6 #8 - LOCKWASHER INSTALLATION February 10, 2017 F900-57-14 Revision 1 Page 10 / 11 ### Page 13 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 900 F900 -460 INSPECTION REPORT To be filled out and emailed to CommandCenter@dassault-aviation.com Aircraft Serial Number: Service Station or Operator performing the inspection: Date: Describe, in the following tables, the initial configuration of tracks #7, #6 and #8: INSPECTION OF LH WING Track #7 Track #6 Track #8 Presence of white marks Yes L No Yes No Yes No Lockwasher correctly folded Yes No Yes No Yes No Screw correctly tightened Yes L No Yes No Yes No INSPECTION OF RH WING Track #7 Track #6 Track #8 Presence of white marks Yes L No I Yes No Yes Lockwasher correctly folded Yes t No Yes No Yes No Screw correctly tightened Yes L NoL Yes No Yes No Figure 4: INSPECTION REPORT February 10, 2017 F900 -57-14 END OF DOCUMENT Revision 1 Page 11 / 11 ### Page 14 (OCR) NO POSTAGE NECESSARY FROM IF MAILED IN THE UNITED STATES ZIP CODE BUSINESS REPLY MAIL FIRST CLASS MAIL PERMIT NO. 3306 HACKENSACK, NJ 07602 POSTAGE WILL BE PAID BY ADDRESSEE: DASSAULT FALCON JET CORP. PO BOX 1946 SO HACKENSACK NJ 07606-9946 ATTENTION: FIELD SERVICE DEPARTMENT DASSAULT AVIATION 78, Quai Marcel Dassault Cedex 300 92552 SAINT-CLOUD Cedex FRANCE A l'attention de DSC ### Page 15 SERVICE BULLETINS COMPLIANCE FALCON 900 A/C S/N DASSAULT AVIATION Number ATA Number F900 460 F900 57 14 Coding: C complete compliance T partial compliance Performed by: Remarks: Revision 1 Date: Signature: SERVICE BULLETINS COMPLIANCE Would you be kind enough to inform us that this Service Bulletin is complied with: - For "Western Hemisphere", mail upper card (No postage necessary if mailed in the U.S.A.) or fax to Dassault Falcon Jet: 1-201-541-4700. - For "Other Continents", mail card herebelow or fax to Dassault Aviation: 33 (0)1.47.11.65.21. On the occasion, if other Service Bulletins have been simultaneously complied with could you complete the blank spaces provided for this purpose. APPLICATION DE BULLETINS DE SERVICE Lorsque vous aurez applique ce Bulletin de Service sur votre avion, veuillez avoir l'amabilite de nous en informer: - Utiliser la carte reponse superieure pour continent americain (Dispensee de timbrage pour postage depuis les U.S.A.) ou le fax pour Dassault Falcon Jet : 1-201-541-4700. - Ou la carte reponse inferieure pour autres continents ou le fax pour Dassault Aviation : 33 (0)1.47.11.65.21. Eventuellement, si d'autres Bulletins de Service ont ete appliques simultanement, vous pouvez les mentionner dans les cases vierges prevues a cet effet. APPLICATION DES BULLETINS DE SERVICE SERVICE BULLETINS COMPLIANCE FALCON 900 A/C S/N DASSAULT AVIATION Number Numero DASSAULT AVIATION ATA Number Numero ATA F900 460 F900 57 14 Coding: C complete complianceapplication totale T partial complianceapplication partielle Performed by: Fait par: Remarks: Revision 1 Date: Signature: Remarques: Revision 1 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.