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 therein 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 therein 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 therein 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 therein 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 therein 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 therein 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 therein 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 DEPARTMENT

CABLELOOM CONNECTIONLIST

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 NUMBER 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

F0N9-1780NK20 01316-95004 A.R.
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.