# Dassault Service Bulletin F50-531: No revision named - Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2016-7420; AD 2017-01-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Dassault Service Bulletin F50-531](https://openairdocs.org/service-documents/dassault/f50-531.md) - Title as filed: SB F50-531 - Pages: 13 - PDF: https://openairdocs.org/files/sha256/55/ec/55ec9826796727901a75b3b0cb3a90455d7b068656f73e284e53a7fe52431014 - Page: https://openairdocs.org/service-documents/dassault/f50-531/file/55ec98267967 ## 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 50 No 531 DECEMBER 09, 2014 MANDATORY ATA 52-22 DOORS PASSENGER DOOR PASSENGER DOOR CLOSING INSPECTION FALCON SERVICE BULLETIN Copyright © 2014 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. 207 ### Page 2 DOORS PASSENGER DOOR PASSENGER DOOR CLOSING INSPECTION Initial issuance December 09, 2014 List of effective pages : 1 to 9 FALCON 50 F50 -531 F50 -52-22 ### Page 3 DOORS PASSENGER DOOR PASSENGER DOOR CLOSING INSPECTION 1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to MYSTERE-FALCON 50 aircraft with serial numbers 2 through 352. B. REASON At the end of a FALCON 20 flight, in approach at 7000 ft, the passenger door opened and separated from the aircraft. The crew managed to maintain control of the aircraft and landed without incident. The purpose of this Service Bulletin is to make sure that the passenger door closes and locks correctly as part of normal procedures. C. DESCRIPTION The operation consists in: • checking the operation of all rotary latches (A1 to A10) with passenger door in open position, • checking the operation of the rotary latch (A10) with passenger door in closed position, • checking the operation of the warning system that monitors the position of the latches when locking the passenger door, • checking the condition of the passenger door locking indication. D. COMPLIANCE Mandatory: • It is anticipated that this Service Bulletin will be rendered mandatory by an EASA Airworthiness Directive. • As prescribed by the Airworthiness Authorities of the country of registration of the aircraft. It is anticipated that this Service Bulletin will be rendered mandatory by an EASA Airworthiness Directive. 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 which may be performed on this occasion. G. TOOLING - PRICE AND AVAILABILITY Normal maintenance tooling. FALCON 50 F50 -531 December 09, 2014 F50 -52-22 Initial issuance Page 1 / 9 DASSAULT AVIATION Proprietary Data ### Page 4 H. WEIGHT AND BALANCE Change in weight: None. Change in balance with respect to 25% MAC: None. I. REFERENCES Aircraft Maintenance Manual: • GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801) • GENERAL INSTRUCTIONS APPLICABLE TO CABLES - INSPECTION, DAMAGE CRITERIA, LUBRICATION (Refer to TASK 20-35-01-910-801) • ENERGIZATION / DE-ENERGIZATION OF THE AIRCRAFT (Refer to TASK 24-00-00-860-801) • INSPECTION CHECK AND SERVICING OF THE PASSENGER DOOR (Refer to TASK 52-10-00-200-803) • ADJUSTMENT OF THE PASSENGER DOOR (Refer to TASK 52-10-00-820-801) • REPLACEMENT OF THE PASSENGER DOOR POSITION INDICATING MICROSWITCH (31M1) (Refer to TASK 52-70-05-960-801) J. OTHER PUBLICATIONS AFFECTED The following publication is revised to account for the changes introduced by this Service Bulletin: • Airplane Flight Manual. The following publication will be revised at a later date to account for the changes introduced by this Service Bulletin: • Aircraft Maintenance Manual revision. FALCON 50 F50 -531 December 09, 2014 F50 -52-22 Initial issuance Page 2 / 9 DASSAULT AVIATION Proprietary Data ### Page 5 2. ACCOMPLISHMENT INSTRUCTIONS A. PRELIMINARY STEPS (1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801). (2) Make sure that the following doors are closed: • the baggage compartment door ( BAG), • the servicing compartment door ( MSD), • the front toilet drainage door (if optional front toilet is installed). (3) Open the passenger door. (4) Energize the aircraft system (Refer to TASK 24-00-00-860-801). (5) Make sure that the indicator light is illuminated on the warning panel "32W" ( fig. 2). • "CABIN" warning light for aircraft without PROLINE4 avionics ou, • "DOORS" warning light "32W47" for aircraft with PROLINE4 avionics. B. INSPECTION OF CLOSING SYSTEM (1) Inspection with passenger door in open position: (a) Remove the first step (G-fig. 1). (b) Remove the side fairings (Refer to TASK 52-10-00-200-803 , paragraphs 3.D.(1) and (2) ) and inspect: • the cables (Refer to TASK 20-35-01-910-801), • the rollers general condition (Refer to TASK 52-10-00-200-803 , paragraph 4.F), • the pulleys general condition (Refer to TASK 52-10-00-200-803 , paragraph 4.F), NOTE 1: For correct inspection of cables near pulleys, actuate the inner latching control (D-fig. 1). NOTE 2: If condition is not satisfactory (Refer to TASK 52-10-00-200-803). (c) Using the inner latching control ( fig. 1) move all the rotary latches as follows: 1 Move the inner latching control from the open position (C-fig. 1) to the closed position (D-fig. 1). NOTE 1: Before approach hook latches (B-fig. 1) start to move, the operator should feel a hard spot that disappears continuing movement. NOTE 2: There is a second hard spot before the beginning of rotary latches movement. 2 When inner latching control is in the closed position (D-fig. 1), push it firmly while checking the back and forth motion of the red safety catch (E-fig. 1). NOTE: The back and forth motion is associated with a click (mechanical lock). 3 Make sure that the red safety catch (V-fig. 4) is aligned with the red marker (U-fig. 4) on the door. FALCON 50 F50 -531 December 09, 2014 F50 -52-22 Initial issuance Page 3 / 9 DASSAULT AVIATION Proprietary Data ### Page 6 4 If the red marker is absent or hardly visible on the passenger/crew door, restore it with red paint. (d) Make sure that inner latching control locks correctly by gentle pull on it. (e) Make sure that the ten rotary latches (A-fig. 1) have all rotated together. NOTE: Rotary latches (A1-fig. 1) to (A10-fig. 1). (f) Make sure that the lateral rotary latch (A10-fig. 1) has rotated by 90° ± 10°, if not (Refer to TASK 52-10-00-200-803 , paragraph 11). (g) Push the red safety catch (E-fig. 1) to unlock the ten rotary latches (A-fig. 1). (h) Using the inner latching control, rotate the ten rotary latches (F-fig. 1) to initial position 0°. (2) Inspection with passenger door in closed position: (a) Door open, as shown on fig. 3, make marks as follows: 1 Point a marker (X-fig. 3) on the lateral door fitting corresponding to lateral rotary latch (A10-fig. 1). NOTE: Local painting means, thickness 1 mm (0.04 in.). 2 Do an identification mark (Y-fig. 3) on the lateral rotary latch (A10-fig. 1). NOTE: Local painting means, thickness 11 mm (0.43 in.). (b) From inside, make sure that all rotary latches are correctlly linked together as follows: NOTE: Rotary latches (A1-fig. 1) to (A10-fig. 1). 1 Using the control (F-fig. 2), slowly close the door and hold it in position. 2 Move the inner latching control from the open position (E-fig. 2) to the closed position (C-fig. 2). NOTE 1: Before approach hook latches (B-fig. 2) start to move, the operator should feel a hard spot that disappears continuing movement. NOTE 2: There is a second hard spot before the beginning of rotary latches movement. 3 Make sure that the rotary latches move jointly without any contact against their fittings (airframe side) (if contact, (Refer to TASK 52-10-00-820-801 , paragraph "CHECK OF LOCATION AND CLEARANCES OF ROTARY HOOKS, WITH DOOR CLOSED AND LOCKED")). More particularly check that picking latch (A10-fig. 1) moves jointly with (A1-fig. 1). 4 Before the approach hook latches (B-fig. 2) movement there is a hard point that disappears during inside control transition. 5 Inner latching control at the closed position (C-fig. 2), firmly push the inner latching control while checking the back and forth motion of the red safety catch (D-fig. 2). NOTE: The back and forth motion is associated with a click (mechanical lock). 6 Make sure that the red safety catch (V-fig. 4) is aligned with the red marker (U-fig. 4) on the door. 7 Make sure that inner latching control locks correctly by gently pulling on it. FALCON 50 F50 -531 December 09, 2014 F50 -52-22 Initial issuance Page 4 / 9 DASSAULT AVIATION Proprietary Data ### Page 7 8 Make sure that the rotary latch (A10-fig. 1) has rotated and that the marker (X-fig. 3) points within the quadrant (Y-fig. 3). 9 If it is not, (Refer to TASK 52-10-00-200-803 , paragraph 11). 10 Open the passenger door. (3) Make sure that the following microswitches operate properly: • microswitch ( 31M1) (X-fig. 1), • microswitch ( 31M2) (Y-fig. 1), • microswitch ( 34M) (outer handle of the passenger door), • microswitch ( 32M) (baggage compartment door (BAG)), • microswitch ( 33M) (servicing compartment door (MSD)), • forward toilet compartment door microswitch ( 36M) (option). (a) Install the side fairings (Refer to TASK 52-10-00-200-803 , paragraph 13.B.). (b) Test microswitches (31M1), (31M2) and (34M) (Refer to TASK 52-70-05-960-801 , paragraph I.). NOTE 1: Before testing, check that the servicing compartment and baggage compartment doors are closed and locked. NOTE 2: If option is installed, check that the forward toilet compartment door is closed and locked. (c) Troubleshoot the microswitches ( 31M1), (31M2) or (34M) if tests are not correct. (d) Test each compartment door microswitch individually as follows: • microswitch ( 32M) (baggage compartment door (BAG)), • microswitch ( 33M) (servicing compartment door (MSD)), • forward toilet compartment door microswitch ( 36M) (option). 1 With the passenger door in closed position, alternately open each of the compartment doors and make sure that: • (A/C with engines TFE 731-40 or with PROLINE4 avionics), the "DOORS" light (32W47) illuminates on the warning panel (32W). • (A/C with engines TFE 731-3 or without PROLINE4 avionics), the "CABIN" light illuminates on the warning panel (32W). 2 Troubleshoot the microswitches ( 32M), (33M) or (36M) if tests are not correct. C. FINAL STEPS (1) De-energize the aircraft system (Refer to TASK 24-00-00-860-801). D. 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 50 F50 -531 December 09, 2014 F50 -52-22 Initial issuance Page 5 / 9 DASSAULT AVIATION Proprietary Data ### Page 8 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 50 F50 -531 EWD Hinges Rotary latch Approach Hook latch B) I (X) "31М1" (У "31М2" eoretical Views from outside Unlock position Lock position C Open position Inner latching control D (Closed position) Safety catch E Figure 1: INSPECTION FROM OUTSIDE December 09, 2014 F50-52-22 Initial issuance Page 6 / 9 ### Page 9 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 50 F50 -531 FWD A/C without PROLINE4 avionics "CABIN" warning light Unlock position Control lever COPUTER COMPUTER COPUTER CONFIG L.PITOT R.PITOT O. UNIT UNLOCI PRESS ACCU GEN 2 TEN 3 APU GEN Safety catch FUEL ING LO FUEL APU BLEED BLEED CABIN DOORS "32W" "DOORS" warning light "32W47" FWD 31M E Inner latching control (Open position) Lock position Lock position Left door view Views from inside Rotary latch Closed position C B Approach Hook latch Figure 2: INSPECTION FROM INSIDE December 09, 2014 F50-52-22 Initial issuance Page 7 / 9 ### Page 10 (OCR) DASSAULT SERVICE BULLETIN AVIATION FALCON 50 F50 -531 Lateral rotary latch (A10) in locked position Door fitting Rotary latch Door fitting Center line Rotary latch Center Tine Marker thickness 1 mm (0.04 in.) 11 mm (0.43 in.) (local manufacture) Quadrant (local manufacture) Figure 3: ANGULAR POSITION - INSPECTION December 09, 2014 F50-52-22 Initial issuance Page 8 / 9 ### Page 11 (OCR) DASSAULT AVIATION FALCON 50 SERVICE BULLETIN F50 -531 Red markers thickness in accordance with red safety catch (local manufacture) Red safety catch in locked position Figure 4: RED SAFETY CATCH - MARKER December 09, 2014 END OF DOCUMENT F50-52-22 Initial issuance Page 9 / 9 ### Page 12 (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 13 SERVICE BULLETINS COMPLIANCE FALCON 50 A/C S/N DASSAULT AVIATION Number ATA Number F50 531 F50 52 22 Coding: C complete compliance T partial compliance Performed by: Remarks: Initial issuance 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 50 A/C S/N DASSAULT AVIATION Number Numero DASSAULT AVIATION ATA Number Numero ATA F50 531 F50 52 22 Coding: C complete complianceapplication totale T partial complianceapplication partielle Performed by: Fait par: Remarks: Initial issuance Date: Signature: Remarques: Edition originale --- 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.