I ' 

Service Bulletin 

Fokker F28 

This Service Bulletin 

partly supersedes 

SBF28-28-047 

"This Service Bulletin is associated with the Fuel Tank Safety Program" 

General -The Introduction of a Fuse in the Level Control Pilot Valve Wiring 

1. Planning Information 

A ffectivity 

(1) F28 Mk 1 000/2000/3000/4000(C) aircraft serial numbers: 

11003thru 11241,11991 and 11992. 

(2) Production version of this modification: Not applicable. 

B. Concurrent Requirements 

(1) Not applicable. 

C. Reason 

Page 

(1) The design review of the F28 Mk 1 000/2000/3000/4000(C) 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 vapor space. 

(3) The fuse, packed in a jiffy junction will limit the current and thus prevent this ignition 

source in the wing tank vapor space. 

1 2 3 4 5 6 7 8 

Revision 2 2 2 2 2 2 2 2 

Attachments 3 Drawing sheets. For a detailed listing refer to page 5. 

Jun 23/10 SBF28-28-051 

Revision 2, Nov 03/14 Page 1 Copynght 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 
I 

I 

_Reason for revision 

(1) This revision is made to: 

Service Bulletin 

Fokker F28 

- Inform that this Service Bulletin partly supersedes Service Bulletin SBF28-28-047. 

- To delete a note in paragraph 1.E.(1) Compliance. 

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 original issue date of this Service Bulletin. 

NOTE: EASA Airworthiness Directive 2010-0195 has been issued with respect to 

this subject. 

F. Approval 

(1) The technical content of this document is approved under the authority of DOA ref. 

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 

Removal 

Modification 

Installation 

Testing 

Total 

Men Man-hours 

2 2 

2 2 

5 

Elapsed time 

(hours) 

1 

1 

1 

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 SBF28-00-001 (Service bulletin 

Introduction, section 2.C., "Manpower"). 

SBF28-28-051 Jun 23/10 

Page 2 Revision 2, Nov 03/14 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. 
H. Weight and Balance 

(1) Weight change: 

Index change: 

I. Electrical Load Data 

(1) Not affected. 

None 

None. 

J. Software Accomplishment Instructions 

(1) Not applicable. 

K. References 

(1) F28 Maintenance Manual (MM) 

F28 Wiring Diagram Manual (WDM) 

F28 Service Bulletin (SB): 

- SBF28-28-050 

- SBF28-28-056. 

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 

- F28 Wiring Manual (WDM) 

- F28 Maintenance Manual (MM) 

Service Bulletin 

Fokker F28 

- chapter 28-21 

-chapter 28-21 

NOTE: See attached Manual Change Notification MCNM F28-034. 

(b) Maintenance Programs 

Not affected. 

Jun 23/10 SBF28-28-051 

Revision 2, Nov 03/14 Page 3 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 
Service Bulletin 

Fokker F28 

(c) Special Instructions for Continued Airworthiness (ICA) 

The effect of this Service Bulletin on the special ICA is as follows: 

- Electrical Wiring Interconnection System (EWIS) 

- Fuel Tank Safety (FTS) 

YES 

X 

NO 

X 

If the aircraft is pre SBF28-28-056 then the fuel CDCCL items 11 .3a and 11.4a, 

as specified in Revision 2 (or subsequent) of SBF28-28-050, are applicable after 

accomplishment of this Service Bulletin. The content(s) of the affected manual(s) 

shall be revised in accordance with MCNM-F28-034. 

If the aircraft is post SBF28-28-056, then the fuel CDCCL items 11 .3b and 11 .4b, 

as specified in Revision 2 (or subsequent) of SBF28-28-050, are applicable after 

accomplishment of this Service Bulletin. The content(s) of the affected manual(s) 

shall be revised in accordance with MCNM-F28-035 and the MCNM attached to 

the applicable appendix of SBF28-28-056. 

(d) Operational Documentation 

Not affected. 

(2) Report to Fokker Services that this SB has been carried out on the applicable aircraft. 

(3) You have the possibility to send your SB feedback to Fokker Services per "Reporting 

Quality Form". This form is located on the last SB page. 

(4) For incorporation of this Service Bulletin in your documentation refer to 

SBF28-00-001 (Service Bulletin Introduction, section 4 "Incorporation of 

Service Bulletins in Documentation of Fokker Services"). 

(5) Accomplishment of this SB is only complete with incorporation of the manual 

change(s), per the ref. MCNM/MCNO, Temporary Revision or General Revision. 

M. Interchangeability or lntermixability of Parts 

(1) Not applicable. 

SBF28-28-051 Jun 23/10 

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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. 
~---------------------------------------s-e_r_v_ic_e_B_u_l_le_t_in ~ Fokker F28 

2. Materiallnformation 

A. Material - Price and Availability 

( 1) You can order the necessary parts as mod kit SB2828051-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/ 

Dis12osition 

22 DR * Tape, Lacing MIL-T43435 Local Source 

Type II, FINISH E 

M81824-.1-1 2 Splice** FC400 Local Source 

2 Wire mate** CM041 Discard 

NOTE: *Use as much as necessary. 

** If applicable. 

(2) These mod kit parts are necessary to do this Service Bulletin on 1 aircraft. 

New Part Number 

W48006-401 

FON1-3613-24-4 

W58048-402 

2 

1m* 

1 ** 

Keyword 

Fuse, Jiffy Junction 1 Amp 

Sleeve 

Cableloom 

Old Part Number Instructions/ 

Dis12osition 

NOTE: * Use as much as necessary, put remaining material into storage. 

** This part of the mod kit is not always applicable. 

C. Tooling - Price and Availability 

( 1) Not applicable. 

D. Drawings Required 

(~) These drawings are necessary to do this Service Bulletin: 

Drawing 

W57231 

W57231 

W58048 

Sheet 

010 

011 

002 

Issue 

K 

K 

Size Description 

A4 RF WD Fuel Control System 

A4 RF WD Fuel Control System 

A3 Cableloom connectionlist 

Aircraft Effectivity 

Refer to A/C config. 

Refer to A/C config. 

All 

Jun 23/1 0 SBF28-28-051 

Revision' 2, Nov 03/14 Page 5 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 'Nith the prior written permission of Fokker Services B.V. 
3. Accomplishment Instructions 

General 

For the finish codes, refer to "Myfokkerfleet.com/documentation/FC". 

Cut the new wires to the correct length where necessary. 

Loosen the cable clamps where necessary. 

\. 

Remove and discard the cable ties where necessary. 

Service Bulletin 

Fokker F28 

Refer to the WM, chapter 20, for the removal and installation of the wires. 

A. The Job Set-Up. 

(1) Remove all electrical power (Refer to the MM, chapter 24-00). 

(2) Put up warning signs to tell persons: 

"DO NOT CONNECT THE ELECTRICAL POWER" 

"DO NOT CONNECT THE BATTERIES". 

B. Get access to work area, open panels 83B & 84B. 

C. Rework of wiring. 

Refer to drawing W57273 sheet 010 or 011 *. 

NOTE: * Use sheet 11 if the wiring contains wire mates (to be verified on A/C). 

(1) Rework the LH outside Fuel tank aircraft wiring . 

(a) Remove the splice or the wire mate (with grommet and contacts). 

(2) Install and identify the jiffy junction. Use: 

1 

1 

1 

- AR 

AR 

NOTE: 

wire (QC33E22)* 

fuse, jiffy junction (QC98-831) 

splice* 

tape, lacing 

sleeve, identification** 

* If applicable. 

ref cableloom W58048-402 

pn W48006-401 

pn M81824-1-1 (FC400) 

pn 22 DR 

pn FON1 -3613-24-4. 

** Use a permanent marker to write "QC98-831 " on the identification 

sleeve. Do not shrink the sleeve. 

SBF28-28-051 Jun 23/10 

Page 6 Revision 2, Nov 03/14 Copyright All rights rdserved 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 agreemenl 

ReproductiOn or disclosure to third parties of th1s 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 'Nith the prior written permission of Fokker Se!'VIces B V. 
(3) Rework the RH outside Fuel tank aircraft wiring. 

Service Bulletin 

Fokker F28 

(a) Remove the splice or the wire mate (with grommet and contacts). 

(4) Install and identify the jiffy junctions. Use: 

1 

1 

1 

- AR 

AR 

wire (2QC33E22)* 

fuse, jiffy junction (2QC98-841) 

splice* 

tape, lacing 

sleeve, identification** 

NOTE: * If applicable. 

ref cableloom W58048-402 

pn W48006-40 1 

pn M81824-1-1 (FC400) 

pn 22 DR 

pn FON1-3613-24-4. 

** Use a permanent marker to write "2QC98-841 " on the identification 

sleeve. Do not shrink the sleeve. 

D. Restore electrical power. 

(1) Restore all electrical power (Refer to the MM chapter 24) 

(2) Remove the warning signs to tell persons: 

"DO NOT CONNECT THE ELECTRICAL POWER" 

"DO NOT CONNECT THE BATTERIES". 

E. Do the following operational test to verify correct operation: 

(1) Do the after installation test of the Level Control Pilot Valve, refer to 

Maintenance Manual, chapter 28-21-03. 

F. Close access panels 838 & 848. 

G. Remove all tools, materials, and equipment from the work area. Make sure the area is 

clean. 

Jun 23/10 SBF28-28-051 

Revision 2, Nov 03/14 Page 7 Copyright All rights reserved by Fokker Services B V (The Netherlands). Thrs 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 th1rd 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 wntten permission of Fokker Serv~ces B V 
Service Bulletin 

Fokker F28 

Service Bulletin Reporting Quality Form 

Use this Service Bulletin Reporting Quality Form to tell us your perception of the quality of the 

Service Bulletin. The reported data that you provide to us will be used to analyze areas of difficulties 

and to take corrective actions to further improve the quality of our Service Bulletins. 

We thank you for the time you have taken in completing this form . 

* Rate the scale of 1 to 4, with 1 the lowest score and 4 the highest score. 

Chapters* 1 2 3 

a) Quality rating of this SB (overall) 0 0 0 

b) Quality rating of the Planning Information 0 0 0 

c) Quality rating of the Material Information 0 0 0 

d) Quality rating of the Accomplishment Instructions 0 0 0 

e) Quality rating of the Test Instructions (if applicable) 0 0 0 

f) Quality rating of the Illustrations or Drawings (if applicable) 0 0 0 

g) Timely delivery of the SB 0 0 0 

If you have had difficulties with one of the chapters of this Service Bulletin and/or one of your 

rating(s) is :lower than 3, please give a short description of the issue. 

Comments: 

Operator: 

Name I Title: 

Please return this form to: Fokker Services B.V. 

Technical Services, Quality Department 

P.O. Box 1357 

2130 EL Hoofddorp 

The Netherlands 

Fax: +31 (0) 88 62801 11 or Email : technicalservices@fokker.com 

4 

0 

0 

0 

0 

0 

0 

0 

SBF28-28-051 Jun 23/10 

Page 8 Revision 2, Nov 03/14 Copyright All nghts reserved by Fokker Services B V (The Netherlands). Th1s 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, 1s not permitted 

except with the prior written permission of Fokker Setv~c s B.V. 
+ 1 I 2 I 3 I 

A 

-

WING FUEL TANK RH 

OUTSIDE FUEL TANK RH STA. 8100 - 11190 

2QCB-745 

"' w i§ - Q® z 

w u LEVEL CONTROL w I W580481 PILOT VALVE "' z ~ 8 n w 

c c 

~ ~ tJ ! ee-e< _., ~"""""" r 1 c 

1 4 FC 400 

~ 2QC98-8 41 

- ~48 006- 401) 

2QC33D22 211:33E22-NK2-

w 

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~ c w u w u c z D \£ c "" u 

~ w w 

FUEL TANK LH ~ _J _J 

~ ~ WING X "' "' w STA. 8I 00 - 11190 

I I ~ QCS-735 - OUTSIDE FUEL TANK LH Q® 

LEVEL CONTROL 

PILOT VALVE 

E n 

,_,_., "'~" y 1 

"' w 

w 

~ _J L_;- w "' u 

~ FC 400 z ~ - "" u I> QC98-831 z ~ ~ 

~4 8006-401) z z w w w 

~ ~ ~ § § 0 

=> D22-NAI ICI3E22-NO- w 

F 

~ ill A 

-

G 

NOTE ' ALL SPLl CES FC 400 

rm~ I W57231 RF ~JRJNG DJAGRAM I 

FUELl NG CONTROL 

SYSTEM r'" 010 ~ISS Kl -

28-21 -0 2 PAGE 001 
+ I I 2 I 3 I 

A 

-

OUTSIDE FUEL TANK RH 

\liNG FUEL TANK RH STA. 8100 - 11190 

20C8-745 

"' w iS QED - z 

w u ~ LEVEL CONTROL 

"' ~ PILOT VALVE w 

~ 

~ n "' u "' 

~ ~ 

w 

,._, -o> oc"~-~~""""- ~ I 

c y 1 4 FC 400 

I> 20C98-841 

- ~4 8006-401) 

21C13D22 2CX:33£;?2-NA2-

Q 

w w 

~ _J 

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w w u D 

"' Q z Q "" z ~ u 

~ w w ~ _J _J \liNG FUEL TANK LH X "' "' OUTSIDE FUEL TANK LH w u "" 5 STA. 8100 - 11190 

I I f - OCS-735 

QED 

~ 

LEVEL CONTROL 

PILOT VALVE 

~ E ,._,_", L ., .... ~=-~, n 

9 1 

w Q 

w "" z _J i5 _J -v· w Q 

~ z w 

Q FC 400 ' Q - ~ ~ 

• OC98-831 ~ ~ 

z z z (W48006-401) 

~ ~ ~ 1 2 5 5 => D22-NAI ICI3E;?2-NAI- B B "' w 

F 

M • .A. 

-

G 

NOTE• ALL SPLJ CES FC 400 

["'~ I \157231 RF \/IRING DIAGRAM I FUELJ NG CONTROL ISH 1'" K -~ SYSTEM 011 -

28-21 -0 2 PAGE 001 
~ FOKKER SERVICES B.V. 

ENGINEERING DEPARTMENT 

CABLELOOM CONNECTIONLIST 

PART NUMBER PART NAME QTY EQUIVALENT DWG NR : W58048 

FON9-1780NK22 El. Cable A.R. 01316-95003 I DASH NR : -402 

ISSUE : -

- - --1- SHEET : 2 

I DATE: 10-04-29 

FROM CABLE LENGTH TO WD DRAWING 

EQUIPNR CNT FC NUMBER SEP TYP GG mm EQUIPNR CNT FC NUMBER REFERENCE 

QC33E22 1 NK 22 500 W57231 W58048-402-

2QC33E22 2 NK 22 500 I W57231 W58048-402-

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