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FALCON 900LX No 450 JULY 16, 2014
MANDATORY ATA 57-15 WINGS SLATS SLAT TRACK #7 - "EXTENSION" MECHANICAL STOP
IMPROVEMENT
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.
WINGS SLATS SLAT TRACK #7 - "EXTENSION" MECHANICAL STOP IMPROVEMENT Initial issuance March 10, 2014 List of effective pages :
1 to 10 Erratum July 16, 2014 List of effective pages :
1 to 11 List of modified pages :
5 and 11 REASON:Correction of conversion value and addition of lockwasher final installation.
FALCON 900EX F900EX -450 F900EX -57-15
WINGS SLATS SLAT TRACK #7 - "EXTENSION" MECHANICAL STOP IMPROVEMENT
1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to F900EX aircraft with serial numbers 240, 242 through 272 (F900LX) which have not previously implemented DASSAULT AVIATION modification F900EX M5870.
B. REASON A F2000LX reported a fuel leak at slat track #7. Inspection showed slat track #7 mechanical stop fell into the fuel cap and punctured it.
Investigation concluded that the mechanical stop got loose as a result of the untightening of the selflocking nut and an improper lockwasher installation.
Dassault Aviation has developed a more robust mechanical stop assembly to avoid this situation.
C. DESCRIPTION At LH/RH wing slat track #7, the operation consists in:
• replacing the old microswitch mechanical stop with a new designed one (no-gap stop),
• replacing the mechanical linkage (pin plus self-locking nut) with a more suitable one (screw plus lockwasher).
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.
E. APPROVAL This Service Bulletin covers DASSAULT AVIATION modification FALCON F900EX M5870 which has been approved under the authority of DOA nr. EASA.21J.051.
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. MATERIAL - PRICE AND AVAILABILITY The modification kit may be obtained from either address listed below:
FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 1 / 11 DASSAULT AVIATION Proprietary Data
Western hemisphere: DASSAULT FALCON JET CORP.
SPARES DISTRIBUTION CENTER 200 RISER ROAD LITTLE FERRY, NJ 07643 U.S.A.
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.
Special tools and equipment:
• slat stop on rail No.7 adjustment wrench ( TF50B27019) I. WEIGHT AND BALANCE Change in weight: Negligible.
Change in balance with respect to 25% MAC: Negligible.
J. REFERENCES Aircraft Maintenance Manual:
• GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801)
• INSERTION AND EXTRACTION OF A WIRE IN A CONNECTOR (Refer to TASK 20-95-00-910-801)
• 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) FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 2 / 11 DASSAULT AVIATION Proprietary Data
• 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) Structural Repair Manual:
• RIVETING (Refer to SRM 51-40-04) K. OTHER PUBLICATIONS AFFECTED The following publications will be revised at a later date to account for the changes introduced by this Service Bulletin:
• Illustrated Parts Catalog.
• Maintenance Manual.
FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 3 / 11 DASSAULT AVIATION Proprietary Data
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 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 29-00-00-860-801 , 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. REPLACEMENT OF MECHANICAL STOPS AT SLAT TRACK #7 NOTE: This procedure is given for mechanical stops, at LH outboard slat. The same procedure is applicable for mechanical stops, at RH outboard slat.
(1) Removal of equipment (see fig. 1):
(a) Remove the microswitch (L16CM)/(R16CM) / support assembly, without electrical disconnection (see detail A):
1 Manually retract the slat by approximately 5 to 6 cm (2 to 2.4 in.) to remove the microswitch / support assembly more easily.
2 Remove screws (a).
3 Remove the microswitch / support assembly from the fixed leading edge.
4 Place the microswitch / support assembly in a suitable position and secure it with tyrap, if required.
(b) Remove the mechanical stops from track #7 (see section AA):
NOTE: Removal of the slat "extended" stop requires the use of the slat stop on rail No.7 adjustment wrench (TF50B27019) to remove nut (b).
1 Manually retract the slat by approximately 5 to 6 cm (2 to 2.4 in.), to remove the microswitch mechanical stop more easily.
2 Remove and discard the microswitch mechanical stop:
• remove nuts (b) and (c),
• remove and discard the microswitch mechanical stop.
3 Remove and discard the slat "extended" stop:
• unsafety pin (d), FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 4 / 11 DASSAULT AVIATION Proprietary Data
• remove and discard pin (d) and the stop,
• discard lockwasher (e).
(2) Assembly of new mechanical stops (see fig. 2 and fig. 3):
(a) Install and fold the tabs of lockwasher (4-fig. 2) in accordance with fig. 3 (see detail C), to facilitate installation.
(b) Install the mechanical stops on track #7 (see fig. 2):
NOTE: Installation of the slat "extended" stop requires the use of the slat stop on rail No.7 adjustment wrench (TF50B27019) to install new screw (3-fig. 2).
1 Manually retract the slat by approximately 5 to 6 cm (2 to 2.4 in.) to install the mechanical stops more easily.
2 Position the new slat "extended" stop (2-fig. 2) and the microswitch mechanical stop (1- fig. 2) on track #7.
CAUTION: DO NOT APPLY MOLYKOTE DX ON SCREW THREAD.
3 Apply molykote DX on screw barrel (3-fig. 2) (see section AA).
4 Install screw (3-fig. 2) fitted with lockwasher (4-fig. 2), and nut (c-fig. 1):
• Torque the screw to between 0.75 mdaN (66.4 in.lbf) and 0.99 mdaN (87.6 in.lbf),
• tighten the nut.
5 Lock screw (3-fig. 2) with lockwasher (4-fig. 2), by fully folding the relevant tabs:
• Make sure that the tabs are tightly flattened on the microswitch mechanical stop (1-fig. 2) and on the screw head.
6 Put white paint on the screw head (3-fig. 2).
7 Check that the distance between the guide ramp and the electrical harness is ≥ 8 mm
(0.3 in.) (see fig. 3, detail D):
• If not, re-arrange the harness routing using binding braid.
(c) Install the microswitch ( L16CM)/(R16CM) / support assembly (see fig. 2, detail A):
1 Manually retract the slat by approximately 5 to 6 cm (2 to 2.4 in.) to install the microswitch / support assembly more easily.
2 Position the microswitch / support assembly on the fixed leading edge.
3 Install and tighten screws (a).
FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 5 / 11 DASSAULT AVIATION Proprietary Data
(3) Updating the outboard slat part number:
CAUTION: ENGRAVE NEW PART NUMBER WITH A MICRO-ENGRAVER, IF THE IDENTIFICATION PLATE IS ALREADY INSTALLED ON THE AIRCRAFT.
(a) Engrave new part number on the identification plate (5-fig. 3), by adding the suffix "R7" after the existing part number.
NOTE: As example, outboard slat P/N F2MB135L2 becomes F2MB135L2 R7.
(b) Install the identification plate (5-fig. 3) with two rivets (6-fig. 3), in accordance with fig. 3 (see detail E) (Refer to SRM 51-40-04).
FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 6 / 11 DASSAULT AVIATION Proprietary Data
C. TESTS
(1) Check the mechanism of the slat extended microswitch (L16CM)/(R16CM) (Refer to TASK 27-80-17-960-801 , paragraph "Adjustment/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 Position 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 access panels No. 3 ( 522CB) and (622CB).
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 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 7 / 11 DASSAULT AVIATION Proprietary Data
3. MATERIAL INFORMATION A. MODIFICATION KIT Kit P/N SBF2000X0344A
NEW P/N Q T Y
KEY WORD OLD P/N INSTRUCTIONS /DISPOSITION ITEM-FIG F2MB134003002L3P 01 1 LH microswitchmechanical stop F2MB134003002L1 1-fig. 2 F2MB144003002L3P 01 1 RH microswitchmechanical stop F2MB144003002L1 F2MB134003003L1 1 LH slat "extended" stop F2MB134003003L1 2-fig. 2 F2MB144003003L1 1 RH slat "extended"stop F2MB144003003L1 NAS674V9XF 2 Screw F2MB144003003L1 Screw supersedes pin 3-fig. 2 3340CA063 2 Lockwasher 33340CA079 4-fig. 2 79122 2 Part number plate Installation with rivets 5-fig. 3 TLUK419BH006 4 Rivets 6-fig. 3 78750-04 2 Tyrap To attach the microswitch / support assembly (if required) B. LOCAL PROCUREMENT As indicated in Consumable Products Manual (CPM):
• molykote DX
• Black binding braid (P/N : 01FFFTF4BK) (as required) FALCON 900EX F900EX -450 July 16, 2014 F900EX -57-15 Initial issuance Page 8 / 11 DASSAULT AVIATION Proprietary Data
DASSAULT SERVICE BULLETIN
AVIATION FALCON 900EX F900EX -450 slat mechanical stops : see detail A RIB 7 Track #7
- LH Wing -
DETAIL A microswitch mechanical stop slat "extended" stop Track #7 microswitch/support assembly A-A _ roller slat "extended" stop microswitch mechanical stop Figure 1: MECHANICAL STOPS AT SLAT TRACK #7 - BEFORE MODIFICATION July 16, 2014 F900EX -57-15 Initial issuance Page 9 / 11
DASSAULT
AVIATION FALCON 900EX slat mechanical stops : see detail A
SERVICE BULLETIN F900EX -450 new label to be stuck: see figure 3, detail E RIB 7 Track #7
- LH Wing -
DETAIL A microswitch mechanical stop screw specific gap required at installation:
see figure 3, detail D slat "extended" stop LEWD lockwasher (see figure 3, detail C for installation) microswitch / support assembly A-A interlay molykote DX for screw assembly (not in thread) slat *extended" stop Track #7 microswitch mechanical stop
0.75 mdaN (66.4 in.Ibf) < bolt torque < 0.99 mdaN (87.6 in. Ibf) Figure 2: MECHANICAL STOPS AT SLAT TRACK #7 - AFTER MODIFICATION (1) July 16, 2014 F900EX -57-15 Initial issuance Page 10 / 11