## 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 1000/2000/3000/4000(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 ofthe 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 ofthe 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 Revision 2, Nov 03/14 Page 1 Copyright AU 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 provis1ons of an agreement 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 Airworth iness 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 d isclosure 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.VG. 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 ofthis Service Bulletin . The content(s) of the affected manual(s) shall be revised in accordance with MCNM-F28-035. Ifthe 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 Page 4 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 th is 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 Page 6 Revision 2 , Nov 03/14 Copyright All rights f.eserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V. to rts customers on a confidentlll basis subject to the prOVIsions of an agreement 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 ofthe 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 ofwiring 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 Revision 2 , Nov 03/14 Page 7 Copyright AU rights 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

**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 Page 8 Revision 2, Nov 03/14 Copyright All rights reserved by Fokker Services B.V. (The Netherlands) . ThiS document has been supplied by Fokker Services 8 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 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 ofthe 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 Ifyou have had difficulties with one of the chapters of this Service Bulletin and/or one ofyour 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. Techn ical 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."' z

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### WRID22-NAI **WRIE22-II<I** WING FUEL TANK RH STA. 2535 - 4700 2\JPJ-741 (: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 ' 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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