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 Collector Tank Level Float Switch Wiring 

1. Planning Information 

A. Effectivity 

(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 can develop in the wing tanks. 

(2) Under certain failure conditions of the Collector Tank Level Float Switch wiring 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 9 

Revision 2 2 2 2 2 2 2 2 2 

Attachments 2 Drawing sheets. For a detailed listing refer to page 6. 

Jun 23/1 0 SBF28-28-049 

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Reproduction or disctc sure 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 pnor 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. 

-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 2010-0194 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. 

SBF28-28-049 Jun 23/10 

Page 2 Revision 2, Nov 03/14 Copynght AM nghts reserved by Fokker ServiCes 8 V (The Netherlands) This document has been supplied by Fokker ServiCes 8 V to 1ts customers on a conftdenllal basis subject to the provisions of an agreement. 

Reproduction or disclosure to lh•rd parties of th1s document or any part thereof, or the use of any 1nformat10n conta1ned therein for purposes other than explicitly allowed by the aforesaid agreement IS not permitted 

e)(cept with the prior written permissiOn of Fokker Servtces B.V 
G. Manpower 

Service Bulletin 

Fokker F28 

(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 

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 the SBF28-00-001 (Service Bulletin 

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

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) F28 Maintenance Manual (MM) 

F28 Wiring Diagram Manual (WDM) 

F28 Service Bulletin (SB): 

- SBF28-28-056 

Fokker drawing(s): refer to page 6 

Fokker internal reference(s): 

- ECR 15105. 

Jun 23/10 SBF28-28-049 

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 basts 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 aforesatd agreement, ts not permitted 

except with the prior written permission of Fokker Services B.V. 
Service Bulletin 

Fokker F28 

L. Publications Affected 

(1) This SB affects the publications listed below: 

(a) Maintenance Documentation 

- F28 Wiring Diagram Manual (WDM) - chapter 28-45 

- F28 Maintenance Manual (MM) - chapter 28-45 

NOTE: See attached Manual Change Notification MCNM F28-035. 

(b) Maintenance Programs 

Not affected. 

(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 9.3a and 9.4a, 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-F28-035. 

If the aircraft is post SBF28-28-056, then the fuel CDCCL items 9.3b and 9.4b, 

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"). 

SBF28-28-049 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. 
Service Bulletin 

Fokker F28 

(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. 

" I 

Jun 23/10 SBF28-28-049 

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 bas1s subject to the provrsions 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 Servtces B.V. 
2. Material Information 

A. Material - Price and Availability 

(1) You can order the necessary parts as mod kit SB2828049-XU-A. 

Service Bulletin 

Fokker F28 

(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 illY Ke~word Info Old Part Number Instructions/ 

Dis12osition 

22 DR * Tape, Lacing MIL-T43435 Type Local Source 

II , FINISH E 

M81824-1-1 2 Splice FC400 Local Source 

NOTE: * Use as much as necessary. 

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

New Part Number Ke~word Old Part Number Instructions/ 

W48006-403 

FON1-3613-24-4 

W58048-401 

2 

1m* 

1 

Fuse, Jiffy 

Junction 

Sleeve 

Cableloom 

0.25 Amp 

Disj2osition 

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 

W57273 

W58048 

Sheet 

002 

001 

Issue 

c 

Size Description 

A3 RF WD Collector Tank Level Warning 

A4 Cableloom Connectionlist 

Aircraft Effectivity 

All 

All 

SBF28-28-049 Jun 23/10 

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Reproduction or di$Ciosure to th1rd part1es of thrs document or any part thereof, or the use of any informatiOn contained therein for purposes other than explicitly allowed by the aforesa•d agreement. is not permitted 

except with the prior written permission of Fokker SeMces 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 

~efer to the WDM, 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 the collector tank wiring in zones 731 and 741 . Open the panels (81J and 

82J) necessary to gain access. 

Refer to drawing W57273 sheet 002. 

C. Rework of wiring outside the LH Fuel Tank. 

(1) Remove the splice between wire WR1D22-NA1 and the float switch wire. 

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

1 

1 

1 

- AR 

AR 

wire (WR1E22) 

fuse, jiffy junction (WR93-731) 

splice 

tape, lacing 

sleeve, identification 

ref cableloom W58048-401 

pn W48006-403 

pn M81824-1-1 (FC400) 

pn 22 DR 

pn FON1-3613-24-4. 

NOTE: Use a permanent marker to write "WR93-731 " on the identification 

sleeve. Do not shrink the sleeve. 

Jun 23/10 SBF28-28-049 

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Reproduction or disclosure to third part~es of this document or any part thereof, or the use ol any information contained therein for purposes other than explicitly allowed by the aforesaid agreement, is not permitted 

except wrth the prior ~Mritten permission of Fokker Services B.V. 
D. Rework of wiring outside the RH Fuel Tank. 

Service Bulletin 

Fokker F28 

(1) Remove the splice in the wire 2WR1D22-NA2 and the float switch wire. 

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

1 wire (2WR1 E22) 

1 fuse, jiffy junction (2WR93-741) 

1 splice 

AR tape, lacing 

AR sleeve, identification 

ref cableloom W58048-401 

pn W48006-403 

pn M81824-1-1 (FC400) 

pn 22 DR 

pn FON1-3613-24-4. 

NOTE: Use a permanent marker to write "2WR93-741" on the identification 

sleeve. Do not shrink the 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 MM, chapter 24-00). 

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

(1) Collector Tank Low Level Warning Test (refer to the MM, chapter 28-45-01 ). 

G. Close the panels you opened in step B. 

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

clean. 

SBF28-28-049 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 permrtted 

except with the prior written permission of Fokker Services 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) D D D 

b) Quality rating of the Planning Information D D D 

c) Quality rating of the Material Information D D D 

d) Quality rating of the Accomplishment Instructions D D D 

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

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

g) Timely delivery of the SB D D D 

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 6280111 or Email : technicalservices@fokker.com 

4 

D 

D 

D 

D 

D 

D 

D 

Jun 23/10 SBF28-28-049 

Revision 2, Nov 03/14 Page 9 Copyright All rights reserved by Fokker Services 8 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 pnor written permission of Fokker Services 8 V. 
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OOTSIOC rt.U TANK LH ----

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FC 400 

I> VR'!3-73! 

(V48006-403) 

WRID22-NAI WRIE22-II<I 

WING FUEL TANK RH 

STA. 2535 - 4700 

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(:m) 

FLOAT SWITCH 

WING FUEL TANK LH 

STA. 2535 - 4700 

VR3-731 

( Sl39) 

FLOAT SWITCH 

NOTE ALL SPLICES FC 4 00 

lJTL( 

PF II!RJNG DIAGRAM 

COLLECTOR TANK 

LE'IEL >'ARNING 

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L L ' PAGE OU! 
~ 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 

r-- DASH NR : -401 

I 

ISSUE : - I 

I SHEET : 1 

I ----- -- ·- - ---- - --· 

I DATE : 10-04-29 

FROM CABLE LENGTH TO WD DRAWING 

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

-r-

: WR1E22 1 NK 22 500 W57273 W58048-401-

2WR1E22 2 NK 22 500 W57273 W58048-401-

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