Service Bulletin Change Notification 

Fokker 70/100 

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Dec 02/10 Page 1 of 2 

-Change this SB as follows: 

Pages 1 and 2: Change step C.(3) and C.(4) as follows: 

- Step C.(3) and C.(4) are similar. Step C.(4) will be removed. 

Step C.(5) will change into C.(4) 

Page 7: Change step 3, Part 1, A (3) as follows: 

- The elbow pn NSA8304-4D is installed on the overflow valve, or 

 if factory incorporated, hose assy D69282-405 is installed to the overflow valve. 

Page 11: Change Figure 2 as follows: 

 

- In the upper figure change ref -1 hose p/n A69282-403, into ref -1 hose p/n 

A69282-403 with Elbow NSA8304-4D or Hose assy D69282-405 

- In the lower figure remove identification of the elbow and the hoses. 

Reason for change: 

This SBCN is issued to: 

- ad hose assy D69282-405 to the correct configuration. In the factory incorporated 

 modification hose A69282-403 is replaced by D69282-405. 

 Elbow NSA8304-4D was introduced in SBF100-28-007. 

 We do not plan to issue a formal SB revision at this moment. If, however, a revision becomes 

necessary, we will also incorporate this SBCN. 

SERVICE BULLETIN CHANGE NOTIFICATION (SBCN) 

SBF100-28-050/REV 1/01 

for 

Service Bulletin (SB) SBF100-28-050, revision 1, dated Jul 28/10 

FUEL

Distribution - Check and, if applicable, Modification of the Route of the Hoses to 

the Overflow Valves of the Main-Tank Access Panel 
Service Bulletin Change Notification 

Fokker 70/100 

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Dec 02/10 Page 2 of 2 
Service Bulletin 

Fokker 70/100 

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

Jun 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 1 

1. Planning Information

A. Effectivity 

(1) F28 Mark 0070/0100 aircraft serial numbers: 

11244 thru 11585. 

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) Service experience has shown that the fuel sense line from the overflow valves may 

touch the adjacent fuel-quantity indication-probe. Under certain conditions, this may 

result in an ignition source in the wing tank vapour space. 

(3) In 1990, the route and installation of the fuel sense line hose from the overflow valve 

and of the hose/conduit for the wiring from the overflow valve were changed. These 

changes were introduced on most Fokker 70/100 aircraft before delivery of the 

aircraft. For aircraft already delivered, optional Service Bulletin SBF100-28-007 was 

issued. 

Page 1 2 3 4 5 6 7 8 9 10 11 12 

Revision 1 1 1 1 1 1 1 1 1 1 1 1 

This Service Bulletin 

supersedes Service 

Bulletin SBF100-28-007 

 FUEL

 “This Service Bulletin is associated with the Fuel Tank Safety Program” 

Distribution - Check and, if applicable, Modification of the Route of the Hoses to 

the Overflow Valves of the Main-Tank Access Panel 
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. 

SBF100-28-050 Jun 03/10 

Page 2 Revision 1, Jul 28/10 

(4) In 1990, the route and installation of the fuel sense line hose from the overflow valve 

and of the hose/conduit for the wiring from the overflow valve were changed. These 

changes were introduced on most Fokker 70/100 aircraft before delivery of the 

aircraft. For aircraft already delivered, optional Service Bulletin SBF100-28-007 was 

issued. 

(5) This Service Bulletin introduces a check for the correct route and installation of the 

hoses and, if applicable, a change to the route and /or installation. 

Reason for Revision

(1) This revision is made, to: 

- Renumber the paragraphs in Part 2 of the accomplishment instructions, from D-I 

 into A-F (from page 8 onwards), 

- Change the Service Bulletin layout (header). 

D. Description 

This Service Bulletin consist out of two parts: 

(1) Part 1 of this Service Bulletin tells you how to: 

 - Check, if an elbow is installed to the hose for the sense line 

 - Check the route of the hoses from the overflow valve for the main fuel tank 

 - Check if the hoses are kept in position by clamps. 

(2) Part 2 of this Service Bulletin tells you how to: 

- If applicable, install two brackets next to the overflow valve on the main-tank 

 access-panel 

- If applicable, make a modification to the route of the hose for the sense line 

- If applicable, install clamps to keep the hoses in position. 

E. Compliance 

(1) Recommended. 

Part 1: Fokker Services recommends the accomplishment of part 1 of this Service 

 Bulletin not later than 1 May 2017. 

Part 2: If applicable, Fokker Services recommends the accomplishment of part 2 of this 

 Service Bulletin before further flight after accomplishment of part 1. 

NOTE: Because of the required tank opening it is efficient to do this Service Bulletin 

 concurrently with a scheduled tank inspection before the above compliance 

 date. 

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. 
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 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 3 

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) Less than 0,5 man-hours are necessary to do Part 1 of this Service Bulletin on 1 

aircraft if it is combined with a scheduled opening of tank access panel 526BB 

(626BB). 

(2) Approximately 6,0 man-hours are necessary to do Part 2 of this Service Bulletin on 

one aircraft. 

 This table of manpower will help you to schedule and do part 2 of this Service 

 Bulletin: 

Instructions Men Man-hours Elapsed time 

(hours) 

Inspection - - - 

Removal 2 2,2 1,1 

Modification 

Installation 2 3,8 1,9 

Testing - - - 

Total 6,0 3,0 

NOTE: This estimate does not include the time necessary: 

- For the paint to dry and the sealant to cure. 

- To ventilate the fuel tank necessary for doing safe maintenance in the fuel 

 tank Ref AMM Task 28-11-00-860-813-A. 

(3) 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"). 

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. 
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. 

SBF100-28-050 Jun 03/10 

Page 4 Revision 1, Jul 28/10 

K. References 

(1) Fokker 70/100 Aircraft Maintenance Manual (AMM) 

Fokker Consumable Material List (CML) 

Fokker internal reference(s): 

 - SBF100-57-041 

 - ECR 90998. 

L. Publications Affected 

(1) This SB affects the publications listed below: 

(a) Maintenance Documentation

- Fokker 70/100 Illustrated Parts Catalog (IPC) - chapter 28-21 

- Fokker 70/100 Aircraft Maintenance Manual (AMM) - chapter 28-21 

 - chapter 28-11 

NOTE: See attached Manual Change Notification MCNM F100-125. 

(b) Maintenance Programs

Fokker 70/100 Maintenance Review Board (MRB). 

(c) Special Instructions for Continued Airworthiness (ICA)

This Service Bulletin requires a revision to the Instructions for Continued 

Airworthiness (ICA) for: 

 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 CDCCL item as 

 specified below shall be followed. 
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 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 5 

CDCCL: In case of opening and closing of tank access panel 526BB and/or 

 626BB, It shall be assured that the sense line and wiring conduit 

 (hoses) to the wing overflow valve remain routed and clamped in 

 accordance with the configuration in SBF100-28-050. 

 NOTE: The work shall be performed in accordance with the 

 instructions in AMM task 28-11-02-400-814A, changed in 

 accordance with the change instructions in the attached MCNM 

 F100-125. 

(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 

 changes, 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. 

SBF100-28-050 Jun 03/10 

Page 6 Revision 1, Jul 28/10 

2. Material Information

A. Material – Price and Availability 

(1) You can order the necessary parts as mod kit SB10028050-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

F0N1-7107-08 * Locking wire 

(Fk05-047)** 

- - Local source 

NOTES: * Use as much as necessary 

** Refer to the CML for material numbers. 

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

New Part Number Qty Keyword Info Old Part Number Instructions/ 

Disposition

F0N2-1614V03-03 4 Bolt - - - 

MS21103D5 2 Clamp - - - 

MS21103D8 2 Clamp - - - 

NSA8304-4D 2 Elbow - - - 

WIA6281-401 4 Cleat assembly - - - 

C. Tooling – Price and Availability 

(1) Not applicable. 

D. Drawings Required 

(1) Not applicable. 
Service Bulletin 

Fokker 70/100 

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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. 

Jun 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 7 

3. Accomplishment Instructions

General 

 - These instructions are applicable to the LH and the RH installations. 

 - Data for the RH installation is between parentheses. 

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

A. Defuel the main fuel tanks (Refer to the AMM, chapter 12-11-02). 

B. Remove the electrical power from the aircraft (Refer to the AMM, chapter 24-00-00). 

C. Open access panel 526BB (626BB) to get access to the hoses from the overflow valve. 

(Refer to the AMM, chapter 06-30-05 for location of the access panels). 

(Refer to the AMM, chapter 28-11-02 for opening the access panels). 

NOTE: For aircraft in the post SBF100-57-041 configuration retain the access panel gasket 

 pn GSC21-96792-04. 

Part 1:

Refer to figures 1,2 and 3. 

A. Check if: 

(1) The mounting configuration of the hoses at str 2.11 and str 2.12 is in accordance with 

configuration A or configuration B in figure 3, 

(2) The route of the hoses from the overflow valve between wing stations 8780 and 9270 

is in accordance with figure 2, 

(3) The elbow pn NSA8304-4D is installed on the overflow valve. 

B. If the configuration is not in accordance with figure 2 and/or figure 3, continue with Part 2

of this Service Bulletin. 

C. If the configuration is in accordance with figure 2 and figure 3, continue with step C, D, E 

and F of Part 2. 
Service Bulletin 

Fokker 70/100 

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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. 

SBF100-28-050 Jun 03/10 

Page 8 Revision 1, Jul 28/10 

Part 2:

Refer to figures 1,2 and 3. 

A. If the mounting configuration of the hoses at str. 2.11 and str. 2.12 is NOT in accordance 

with configuration A or configuration B in figure 3, then install two cleats as follows: 

(1) Remove and keep these items from the bottom of overflow valve at the two positions 

shown as A: 

 - 2 bolts pn F0N2-1611V03-08 

 - 2 nuts pn MS21042L3 

 - 2 washers pn NAS1252-10L. 

(2) Install two cleat assemblies pn WIA6281-401 at the two positions shown as section AA in figure 2. 

(a) Prepare the bonding contacts of the cleat assemblies and the attachment parts in 

accordance with AMM chapter 28-00-00 (CDCCL) Electrical-Bonding in the fuel 

system. 

(b) Install the cleat assemblies with these items that you kept in step (1): 

 - 2 bolts pn F0N2-1611V03-08 

 - 2 nuts pn MS21042L3. 

 NOTE: Do not use the washers that you kept in step (1) in this step. 

(3) Disconnect hose pn A69282-403 from the overflow valve. 

(4) Install and safety elbow pn NSA8304-4D to the overflow valve as shown in figure 2. 

Use: 

 - Locking wire (material no. Fk05-047). 

(5) Connect hose pn A69282-403 to elbow pn NSA8304-4D. 

 NOTE: Do not tighten the hose in this step. 

Refer to figure 2. 

B. Install hose pn A69282-403 and hose pn D69282-403, as follows: 

(1) Route the hoses to either side of the overflow valve as shown in figure 2. 

(2) Install these items to the hoses: 

 - 2 bolts pn F0N2-1614V03-03 

 - 1 clamp pn MS21103D8 

 - 1 clamp pn MS21103D5. 

 and the two washers pn NAS1252-10L that you kept in step A.(1). 
Service Bulletin 

Fokker 70/100 

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Jun 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 9 

(3) Tighten and safety hose pn A69282-403 to the elbow. Use: 

 - Locking wire (material no. Fk05-047). 

C. Remove the tools, materials and equipment from the work area. Make sure that the work 

area is clean and perform the tank closure inspection in accordance with AMM task 28-00-

00-200-846A. 

D. Install access panel 526BB (626BB). 

NOTE: - For aircraft in pre SBF100-57-041 configuration follow the instruction for 

 closing the access panels in AMM chapter 28-11-02 

 - For aircraft in post SBF100-57-041 configuration follow the instruction for 

 closing the access panels as below, 

(1) Make sure the tank closure inspection (Refer to AMM Task 28-00-00-200-846 for 

more data) is done before installation of the access panels. 

(2) Install the gasket retained in “General “step C on the access panel and mark the 

gasket on the identification block as the gasket can be re-used. 

(3) Install the access panel with the screw to the aircraft. 

(4) Tighten the screws of all access panels with a 0 – 10 Nm (0 – 88 lbf.in) torque wrench 

to between 2,8 and 3,5 Nm (25 and 31 lbf.in; 3/16 in diam. Screws) or 6,4 and 7,7 Nm 

(56 and 68 lbf.in; 1/4 in diam. Screws). 

(5) Let the gasket set themselves for half an hour. 

(6) After half an hour retighten the screws with a 0 – 10 NM (0 – 88 Lbf.in) torque wrench 

to between 2,8 and 3,5 Nm (25 and 31 lbf.in; 3/16 in diam. Screws) or 6,4 and 7,7 Nm 

(56 and 68 lbf.in; !/4 in diam. Screws). 

E. Refuel the main fuel tanks (Refer to the AMM, chapter 12-11-01). 

F. Check for fuel leakage from the access panels. 
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. 

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SBF100-28-050 Jun 03/10 

Page 10 Revision 1, Jul 28/10 

The Route of the Hoses to the Overflow Valve between Wing Stations 8780 and 9270 

 (Pre- Modification Configuration). 

 

 Figure 1 
Service Bulletin 

Fokker 70/100 

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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. 

Jun 03/10 SBF100-28-050 

Revision 1, Jul 28/10 Page 11 

The Route of the Hoses to the Overflow Valve between Wing Stations 8780 and 9270 

 (Post- Modification Configuration) 

 

 Figure 2 
Service Bulletin 

Fokker 70/100 

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SBF100-28-050 Jun 03/10 

Page 12 Revision 1, Jul 28/10 

 Section A-A, LH shown (RH opposite) 

 Configuration A (Post-SBF100-28-050)

 Section A-A, LH shown (RH opposite) 

 

 Configuration B (Factory incorporated) 

 

 The location of the hose attachment at str. 2.12 and str. 2.11 

 

 Figure 3