## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

Jun 23/10 SBF100-28-042 Page 1 1. Planning Information A. Effectivity (1) F28 Mark 0070/0100 aircraft serial numbers:
11244 thru 11585. (2) Production version of this modification: Not applicable. B. Concurrent Requirements (1) Not applicable. C. Reason (1) The design review of the F28 Mk 0070/0100 fuel system in accordance with the guidelines related to FAA SFAR 88 and JAA INT/POL/25/12 revealed that an unsafe condition may develop in the wing tanks. (2) Under certain failure conditions of the Level Control Pilot Valve solenoid or in the wiring to the solenoid, a short circuit may develop. Such a short circuit may result in an ignition source in the wing tank vapour space. (3) The fuse, packed in a jiffy junction will limit the current and thus prevent this ignition source in the wing tank vapour space.

Page 1 2 3 4 5 6 7 Revision - - - - - - - Attachments 2 Drawing sheets. For a detailed listing refer to page 5. FUEL “This Service Bulletin is associated with the Fuel Tank Safety Program” Tank Fueling / De-fueling - The Introduction of a Fuse in the Level Control Pilot Valve Wiring

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

SBF100-28-042 Jun 23/10 Page 2 D. Description (1) This Service Bulletin tells you how to:

- Install the jiffy junctions.

- Perform system functional tests. E. Compliance (1) Recommended. Fokker Services recommends the accomplishment of this Service Bulletin within 2 years after the date of issue of this Service Bulletin.
NOTE : It is expected that EASA will issue an Airworthiness Directive (AD) with respect to this subject with the same compliance terms. Refer to the EASA website for the publication of a Proposed Airworthiness Directive for comments. F. Approval (1) The technical content of this document is approved by EASA or under the authority of DOA nr. EASA.21J.059. G. Manpower (1) Approximately 5 man-hours are necessary to do this Service Bulletin on one aircraft. This table of manpower will help you to schedule and do this Service Bulletin:

Instructions Men Man-hours Elapsed time (hours) Removal - - - Modification 2 2 1 Installation 2 2 1 Testing 1 1 1
Total 5 3

NOTE : This estimate does not include the time necessary for the paint to dry and/or the sealant to cure. (2) The estimated hours are for direct labor done by experienced personnel. They are calculated based on the conditions given in SBF100-00-001 (Service Bulletin Introduction, section 2.C., "Manpower").

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

Jun 23/10 SBF100-28-042 Page 3 H. Weight and Balance (1) Weight change: None Index change: None.
I. Electrical Load Data (1) Not affected. J. Software Accomplishment Instructions (1) Not applicable. K. References (1) Fokker 70/100 Wiring Manual (WM) Fokker 70/100 Aircraft Maintenance Manual (AMM) Fokker Consumable Material List (CML) Fokker drawing(s): refer to page 5 Fokker internal reference(s): - ECR 15105. L. Publications Affected (1) This SB affects the publications listed below: (a) Maintenance Documentation - Fokker 70/100 Wiring Manual (WM) - chapter 28-21 - Fokker 70/100 Aircraft Maintenance Manual (AMM) - chapter 28-21 - Fokker 70/100 Trouble Shooting Schematics Manual (TSSM).
NOTE : See attached Manual Change Notification MCNM F100-129. (b) Maintenance Programs - Fokker 70/100 Maintenance Review Board Document (MRB).

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

SBF100-28-042 Jun 23/10 Page 4 (c) Special Instructions for Continued Airworthiness (ICA) The effect of this Service Bulletin on the special ICA is as follows:

YES NO - Electrical Wiring Interconnection System (EWIS) - X - Fuel Tank Safety (FTS) X - - Damage Tolerance of Fatigue Critical Structure - X
NOTE : If “YES”, when not already incorporated, the changed ICA will be incorporated in the MRB document within one calendar year from the date of issue of this Service Bulletin. Until then, the fuel CDCCL item as specified below shall be followed.
CDCCL : It shall be assured that the over-current protection fuses (electronic in-line junction with integral fuse) in the wiring to the level control pilot valves, located close to the point where the wiring goes into the tank, are installed. Affected part number W48006-401.

NOTE : The verification shall be performed in accordance with the Standard Practices applicable for the installation of this component as described in the Wiring Manual and/or in accordance with the instructions in the AMM task 28-21-03-400-814, changed in accordance with the instructions in the attached MCNM F100-129. (d) Operational Documentation
Not affected. (2) For incorporation of this Service Bulletin in your documentation refer to SBF100-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service Bulletins in Documentation of Fokker Services").
NOTE : Accomplishment of this SB is only complete with incorporation of the manual change(s), per the ref. MCNM, Temporary Revision or General Revision. M. Interchangeability or Intermixability of Parts (1) Not applicable.

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

Jun 23/10 SBF100-28-042 Page 5 2. Material Information A. Material – Price and Availability (1) You can order the necessary parts as mod kit SB10028042-XU-A. (2) You can contact your Fokker Services Account Manager for the price and lead-time of this mod kit. B. Material Required (1) These parts which are necessary to complete this Service Bulletin on 1 aircraft, are not part of the mod kit.
New Part Number Qty Keyword Info Old Part Number Instructions/ Disposition 22 DR * Tape, Lacing Fk05-090(A)** - Local Source M81824-1-1 2 Splice FC400 - Local Source NOTES : * Use as much as necessary ** Refer to the CML for material numbers. (2) These mod kit parts are necessary to do this Service Bulletin on 1 aircraft.
New Part Number Qty Keyword Info Old Part Number Instructions/ Disposition W48006-401 2 Fuse, Jiffy Junction 1 Amp - - F0N1-3613-24-4 1m* Sleeve, Identification - - - M39029-56-351 2 Socket FC356 - - W59520-401 1 Cableloom - - - NOTE : * Use as much as necessary, put remaining material into storage. C. Tooling – Price and Availability (1) Not applicable. D. Drawings Required (1) These drawings are necessary to do this Service Bulletin: Drawing Sheet Issue Size Description Aircraft Effectivity W41192 012 AG A4 RF Wiring Diagram Tank Fueling / De-fueling All
W59520 001 A A4 Cableloom All

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

SBF100-28-042 Jun 23/10 Page 6 3. Accomplishment Instructions
General

- For CML material number reference, refer to “Myfokkerfleet.com/documentation/CML”

- Cut the new wires to the correct length where necessary.

- Loosen the cable clamps where necessary.

- Remove and discard the cable ties where necessary.

- Refer to the WM, chapter 20-13-03, for the removal and installation of the wires

- For finish codes references, refer to “Myfokkerfleet.com/Documentation/FC".
A. Remove all electrical power (Refer to the AMM, chapter 24-00-00, page block 201). B. Put up warning signs to tell persons: "DO NOT CONNECT THE ELECTRICAL POWER" "DO NOT CONNECT THE BATTERIES". C. Open the following panels: Panel number Description Position 536CB Access Door LH Wing 636CB Access Door RH Wing. D. Rework of wiring. Refer to drawings W41192 sheet 12 and W59520 sheet 1. (1) Rework aircraft LH outerwing wiring. (a) Disconnect wire AWF0004-B2 from Plug P1698B contact B and remove and discard the socket. (b) Install the new wires and install and identify the jiffy junction. Connect wire AWF0048-B2 to wire AWF0004-B2. Use:

- 2 wires ref. Cableloom W59520-401 - 1 socket pn M39029-56-351 (FC356) - 1 fuse, jiffy junction F 6233A pn W48006-401 - 1 splice pn M81824-1-1 (FC400) - AR tape, lacing pn Fk05-090(A) - AR sleeve, identification pn F0N1-3613-24-4.
NOTE : Write “F 6233A” on the identification sleeve.

## Service Bulletin Fokker 70/100

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V . to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any information contained there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V.

Jun 23/10 SBF100-28-042 Page 7 (2) Rework aircraft RH outerwing wiring. (a) Disconnect wire AXF0001-B2 from Plug P1706B contact A and remove and discard the socket. (b) Install the new wires and install and identify the jiffy junction. Connect wire AXF0048-B2 to wire AXF0001-B2. Use:

- 2 wires ref. Cableloom W59520-401 - 1 socket pn M39029-56-351 (FC356) - 1 fuse, jiffy junction, F 6232A pn W48006-401 - 1 splice pn M81824-1-1 (FC400) - AR tape, lacing pn Fk05-090(A) - AR sleeve, identification pn F0N1-3613-24-4. NOTE: Write “F 6232A” on the identification sleeve. E. Restore electrical power. (1) Remove the warning signs to tell persons: "DO NOT CONNECT THE ELECTRICAL POWER" "DO NOT CONNECT THE BATTERIES". (2) Install all electrical power (Refer to the AMM, chapter 24-00-00, page block 201). F. Do the following operational test to verify correct operation: (1) Shut-Off Test, refer to AMM 28-21-03-400-814. G. Remove the tools, materials and equipment from the work area. Make sure that the work area is clean H. Close the panels: Panel number Description Position 536CB Access Door LH Wing 636CB Access Door RH Wing.FOKKER SERVICES B.V. ENGINEERING DEPARTMEN T CABLELOOM CONNECTIONLIS T PARTNUMBER PARTNAME CODIFICATION DWG NR : W59520 EL. CABLE DASH NR : -401 ISSUE : A SHEET : 1
DATE : 100429 FROM CABLE LENGTH TO WIRING EQUIPNR CNT FC NUMBE R SEP TYP GG mm EQUIPNR CNT FC DIAGRAM AWF0047 B2 NK 20 250 W41192 AXF0047 B2 NK 20 250 W41192 R AXF0048 B2 NK 20 500 W41192 R AWF0048 B2 NK 20 500 W41192 QTY A.R. F0N9-1780NK20 01316-95004

## Manual Change Notification – Maintenance Documentation Fokker 70/100

JUN 23/10 MCNM F100-129 Page 1 of 4 

### MCNM-F100-129 Subject : Fuel – Introduction of Fuses in the Wiring of the Level Control Pilot Valves. Reason : This MCN is issued to provide you with the changes on the content(s) of the affected manual(s), due to the introduction of SBF100-28-042. Effectivity : Refer to SBF100-28-042. Compliance : Once you have determined the applicability of this MCN for one or more of your aircraft, incorporate this information into the applicable manual(s).
Publications Affected : The Aircraft Maintenance Manual (AMM) The Wiring Manual (WM) The Trouble Shooting Schematics Manual (TSSM). Change Note : AMM Update AMM Task 28-21-03-000-814, as follows:

− In Subtask 28-21-03-020-014-A01, change step (2)(b) that is given for the removal of the LH level control pilot valve, as follows:

− In Subtask 28-21-03-020-014-A01, change step (2)(b) that is given for the removal of the RH level control pilot valve, as follows:

− In Subtask 28-21-03-020-014-A01, change step (3) that is given for the removal of the LH level control pilot valve, as follows:

## Manual Change Notification – Maintenance Documentation Fokker 70/100

JUN 23/10 MCNM F100-129 Page 2 of 4 − In Subtask 28-21-03-020-014-A01, change step (3) that is given for the removal of the RH level control pilot valve, as follows:

Update Task 28-21-03-400-814, as follows:

− Replace the contents of Subtask 28-21-03-965-014-A00, by this procedure:

## Manual Change Notification – Maintenance Documentation Fokker 70/100

JUN 23/10 MCNM F100-129 Page 3 of 4 − In Subtask 28-21-03-420-014-A01, replace the steps (11) thru (13) that are given for the installation of the LH level control pilot valve, by these steps:

− In Subtask 28-21-03-420-014-A01, replace the steps (11) thru (13) that are given for the installation of the RH level control pilot valve, by these steps:

## Manual Change Notification – Maintenance Documentation Fokker 70/100

JUN 23/10 MCNM F100-129 Page 4 of 4 Update Task 28-21-00-ZZ2-810-A/B (as applicable), as follows:

− Add a new paragraph that contains this text: Fuse Jiffy-Junction Assembly(1) The fuses prevent that a short-circuit in the electrical-installation of a levelcontrol pilot-valve can result in an ignition-source in the fuel tank. (2) The fuse jiffy-junction assemblies are installed in the electrical-wiring of the level-control pilot-valves, between the wing rear-spar and the main tank in zone 536 and 636.

− Add the new fuse jiffy-junction assemblies to the Component Location Index.

WM/TSSM Update Chapter 28-21, in accordance with the drawings as given in SBF100-28- 042, paragraph 2.D.).

NOTE: If you have a Documentation Revision Service (DRS) with Fokker Services, this information will be included into your manuals at the earliest opportunity.