Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 1 

1. Planning Information 

A. Effectivity 

(1) F27 Mark 050, 0502 and 0604 aircraft serial number(s): 

20133 thru 20335, if no inboard tanks are installed. 

B. Concurrent Requirements 

(1) Not Applicable 

Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

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

Page 18 19 20 21 

Revision 1 1 1 1 

This Service Bulletin 

cancels Service Bulletin 

SBF50-28-011 (Part 2) 

 FUEL

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

Distribution - The Installation of New Fuel pipes in LH and RH Nacelle 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 2 Revision 1,Sep 15/10 

C. Reason 

(1) An operator reported that in the LH nacelle the upper rod-end of the spring box of the 

main landing gear (MLG) actuator had touched a fuel pipe and that in the RH nacelle 

the MLG lock link (at the ground lock pin side) had touched another fuel pipe. For that 

reason SBF50-28-011 was issued in 1990 to introduce an inspection in each nacelle 

for a minimum clearance of 1.5 mm between the affected MLG parts and the fuel 

pipes. SBF50-28-011 also required the installation of new fuel pipe part numbers if 

less than 1.5 mm clearance was found. 

(2) The (subsequent) design review of the F27Mk 050, 0502 and 0604 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 if the clearance between the upper 

rod-end of the MLG spring box and the fuel pipe and/or the clearance between the 

MLG lock link at the ground lock pin side and the other fuel pipe is less than 3.0 mm. 

Insufficient clearance may result in a chafing with possibly subsequent fuel leakage. 

With additional factors present, this may result in an unsafe condition. 

(3) As a result, SBF50-28-028 was issued to ensure a minimum of 3.0 mm clearance, 

either by confirming the presence of specific fuel pipe part numbers (part1 of SBF50-

28-28 or, if other fuel pipe part numbers are installed, by measuring the clearance 

(part 2 of SBF50-28-028). Part 2 of SBF-028-028 refers to this service bulletin 

SBF50-28-031 if less than 3.0 mm clearance is measured. This Services Bulletin 

introduces the fuel pipe hardware configuration that ensures at least 3.0 mm 

clearance between subject fuel pipes and the MLG components. 

Reason for Revision

(1) This revision is made to: 

 - Incorporate SBCN SBF50-28-031/01 

 - Change the aircraft effectivity in the Planning Information 1.A.(1) 

 - Correct partnumbers in list of interchangeability of parts 1.M.(1) 

 - Correct partnumbers in list of Old Part Number 2.N.(2) 

 - Add ECR 77435 in References 1.K.(1) 

 - Correct partnumbers in Description 1.D.(1) 

 - Delete NOTE below the CDCCL item in Publication Affected 1.L.(1) (c) 

 - Change header of Service Bulletin 

 - Change approval statement in Approval 1.F.(1) 

 - Attach Revision 1 of MCNM F50-071 to the Service Bulletin. 

D. Description 

(1) This Service Bulletin tells you how to: 

- Remove the fuel pipes pn F8423-112-401 and F8423-107-405 (LH Nacelle) and 

fuel pipes pn F8423-112-402 and F8423-107-407 (RH Nacelle) 

- Install the fuel pipes pn WIF7039-409 or F8423-107-409 and pn WIF7039-413 or 

F8423-112-407 (LH Nacelle) 

- Install the fuel pipes pn WIF7039-411 or F8423-107-411 and pn WIF7039-414 or 

F8423-112-408 (RH Nacelle). 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 3 

E. Compliance 

(1) Recommended. 

Fokker Services recommends the accomplishment of this Service Bulletin: 

- before further flight if, on one of more of the 4 fuel pipes checked in accordance with 

 Part 2 of SBF50-28-028, chafing marks are present or the measured clearance is 

 less than 1.5 mm. 

- within 2 years after the issue date of SBF50-28-028 if, on one or more of the 4 fuel 

 pipes checked in accordance with Part 2 of SBF50-28-028, the measured clearance 

 is between 1.5 mm and 3.0 mm. 

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. 

(2) Optional. 

This Service Bulletin is optional if, for all 4 pipes checked in accordance with Part 2 of 

SBF50-28-028, the measured clearance is more than 3.0 mm. 

F. Approval 

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

EASA.21J.059. 

G. Manpower 

(1) Approximately 75,0 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 2 4,0 2,0 

Modification 

Installation 2 67,0 33,5 

Testing 2 4,0 2,0 

Total 75,0 37,5 

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 SBF50-00-001 (Service Bulletin 

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

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 4 Revision 1,Sep 15/10 

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 50/60 Aircraft Maintenance Manual (AMM) 

Fokker Consumable Material List (CML) 

Fokker 50/60 Service Bulletin (SB): 

 - SBF50-28-011 

 - SBF50-28-028 

Fokker internal reference(s): 

 - ECR 77435, 79054 

 - WI F7039. 

L. Publications Affected 

(1) This SB affects the publications listed below: 

(a) Maintenance Documentation

- Fokker 50/60 Illustrated Parts Catalog (IPC) - chapter 28-16 

- Fokker 50/60 Aircraft Maintenance Manual (AMM) - chapter 32-30. 

NOTE: See attached Manual Change Notification MCNM F50-071 Revision 1. 

(b) Maintenance Programs

- Fokker 50/60 Maintenance Review Board (MRB) 

- Fokker 50/60 Maintenance Planning Document (MPD) 

- Fokker 50/60 Customized Maintenance Program (CMP). 

(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 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 5 

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: In case of replacement or removal / installation of the fuel pipes in the 

 LH and RH nacelle, it shall be assured that the fuel pipes and 

 associated brackets and clamps remain in the post SBF50-28-031 

 configuration. 

(d) Operational Documentation

Not affected. 

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

SBF50-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service 

Bulletins in Documentation of Fokker Services"). 

M. Interchangeability or Intermixability of Parts 

(1) The interchangeability of the parts is as follows: 

New Part Number Keyword Part Number Interchangeability 

F8423-107-409 Fuel pipe WIF7039-409 Two-way 

F8423-107-411 Fuel pipe WIF7039-411 Two-way 

F8423-112-407 Fuel pipe WIF7039-413 Two-way 

F8423-112-408 Fuel pipe WIF7039-414 Two-way 

 

 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 6 Revision 1,Sep 15/10 

2. Material Information

M. Material – Price and Availability 

(1) You can order the necessary parts as mod kits SB5028031-XU-A 

(2) You can contact your Fokker Services Account Manager for the price and lead-time of 

these mod kits. 

N. 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

- * Plasticine - - Local source 

Alodine 1200S * Alodizer FK13-003A ** - Local source 

Metaflex WR * Primer Fk16-001 ** - Local source 

PR1436G-A * Sealing 

compound 

FK09-016 ** Local source 

Simson 1000 * Adhesive FK09-035 ** Local source 

F0N1-7107-10 * Locking wire FK05-048 ** - - 

 

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

- 2 Attachment profile - 1153-010-024 Discard 

- 2 Bolt - NAS1304-15 Discard 

- 2 Bolt - NAS1303-4 Discard 

- 4 Bolt - NAS1303-3 Discard 

- 2 Clamp - MS21919WDF20 Discard 

- 1 Clamp bracket - F8423-085-401 Discard 

- 1 Clamp bracket - F8423-085-402 Discard 

- 4 Nut - MS21042L3 Discard 

- 12 Washer - AN960KD10 Discard 

- 2 Washer - AN960KD416 Discard 

- 4 Nut - MS21042L4 Discard 

AN960-10L 4 Washer - - - 

AN960-416L 8 Washer - - - 

AN960C10L 6 Washer - - - 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 7 

AN960KD10 8 Washer - - - 

AN960KD10L 4 Washer - - - 

F0N1-4550-1-1-5 1 Leather 440 x 30 mm - - - 

F0N18-1221-6-5 12 Hilok - - - 

F0N18-2230-6 12 Collar - - - 

F0N2-1614V03-02 4 Bolt - - - 

F0N2-1614V04-15 2 Bolt - - - 

F0N2-1614V04-29 2 Bolt - - - 

F0N2-3163-3 2 Lockplate - - - 

F0N2-6324S05-10 16 Rivet - - - 

F0N2-6396B402 12 Rivet - - - 

F0N2-7323C20N 2 Clamp assembly - - - 

MS21042L3 12 Nut - - - 

MS21042L4 4 Nut - - 

MS29513-218 16 0-ring - - 

MS3367-1-9 2 Cable tie - - 

NAS1133-2 4 Screw - - 

NAS1303-2 4 Bolt - - 

NAS1303-3 4 Bolt - - 

NAS509-4 4 Nut - - 

WIF7039-003 2 Plate - - - 

WIF7039-005 or 

F8423-085-409 

2 Half clamp - - - 

WIF7039-007 or 

F8423-085-007 

4 Plate - - - 

WIF7039-009 2 Bracket - - - 

WIF7039-013 4 Bracket - - - 

WIF7039-401 2 Bracket - - - 

WIF7039-403 or 

F8423-085-407 

2 Bracket - - - 

WIF7039-405 or 

F8423-085-405 

2 Clamp - - - 

WIF7039-407 or 

F8423-085-403 

2 Clamp - - - 

WIF7039-409 or 

F8423-107-409 

1 Fuel pipe F8423-107-405 Discard 

WIF7039-411 or 

F8423-107-411 

1 Fuel pipe F8423-107-407 Discard 

WIF7039-413 or 

F8423-112-407 

1 Fuel pipe F8423-112-401 Discard 

WIF7039-414 or 

F8423-112-408 

1 Fuel pipe F8423-112-402 Discard 

WIF7039-415 2 Bracket assembly - - 

WIF7039-417 2 Bracket assembly - - 

WIF7057-001 4 Feedthrough 

halves 

 - - 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 8 Revision 1, Sep 15/10 

O. Tooling – Price and Availability 

(1) Not applicable. 

P. Drawings Required 

(1) Not applicable. 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 9 

3. Accomplishment Instructions

General: 

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

- Identify new equipment and install identification placard pn F0N9-9503-1. 

- For the application of Alodine 1201 (Fk13-003D), refer to the AMM, chapter 51-22-00. 

- For the application of Sealing compound PR1436G-A (Fk09-016) refer to the AMM, 

chapter 51-23-00. 

- For the removal/installation of solid rivets, refer to the SRM, chapter 51-40-02, 

- For the installation of blind rivets, refer to the SRM, chapter 51-21-02, 

- For the application of Primer and Paint, refer to the AMM, chapter 51-21-00. 

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY 

THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFETY 

INSTRUCTIONS. 

WARNING: OBEY THE SAFETY PRECAUTIONS AND WARNINGS GIVEN IN THE 

FOKKER 50 AIRCRAFT MAINTENANCE MANUAL, CHAPTER 28-00-00. JET 

FUEL IS EXPLOSIVE AND POISONOUS. 

- Put up warning signs to tell person: 

- DO NOT USE FLAMES OR EQUIPMENT THAT CAUSE SPARKS. 

- DO NOT CONNECT THE ELECTRICAL POWER. 

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

- Data for the RH installation is between parentheses. 

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

- De-fuel and drain the main fuel tanks (Refer to the AMM, chapter 12-11-01). 

- Remove access panels 925AZ (926AZ) (Refer to the AMM, chapter 06-30-09). 

Refer to figures 1 and 2. 

A. Remove fuel pipe pn F8423-112-401 (-402) as follows: 

(1) Remove and keep two couplings pn F0N4-1420C20. 

(2) Remove and discard four O-rings pn MS29513-218. 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 10 Revision 1, Sep 15/10 

(3) Remove and discard these items from the fuel pipe: 

 - 1 clamp bracket pn F8423-085-401 (-402) 

 - 1 bolt pn NAS1304-15 

 - 1 washer pn AN960KD416 

 - 1 nut pn MS21042L4 

 - 2 bolts pn NAS1303-3 

 - 6 washers pn AN960KD10 

 - 3 nuts pn MS21042L3 

 - 1 bolt pn NAS1303-4 

 - 1 clamp pn MS21919WDF20. 

(4) Remove and discard the fuel pipe. 

(5) Put caps on the open fuel lines. 

B. Remove fuel pipe pn F8423-107-405 (-407) as follows: 

(1) Remove and keep two couplings pn F0N4-1420C20. 

(2) Remove and discard four O-rings pn MS29513-218. 

(3) Remove and keep these items from the fuel pipe: 

 - 1 clamp pn TA03114DC20NB 

 - 1 bolt pn NAS1303-4 

 - 1 nut pn MS1042L3 

 - 2 washers pn AN960KD10. 

(4) Remove and discard the fuel pipe. 

(5) Put caps on the open fuel lines. 

Refer to figures 3 and 4. 

C. Remove attachment profile pn 1153-010-024 from stringer 8 as follows: 

(1) Remove two rivets from the position shown as A. 

(2) Remove and discard the attachment profile. 

D. Install plate pn WIF7039-003 to stringer 8 as follows: 

(1) Temporarily install the plate to stringer 8. 

(2) Transfer-drill one hole, 3,2 mm diameter, from stringer 8 into the plate, at the two 

positions shown as A. 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 11 

(3) At the two positions as shown as A, install the plate to stringer 8.Use: 

 - 2 rivets pn F0N2-6396B402 

E. Install bracket pn WIF7039-401 between stringers 8 and 9 as follows: 

(1) Temporarily install the bracket between strings 8 and 9. 

(2) Transfer-drill one pilot-size hole, from the bracket into stringers 8 and 9, at the four 

positions shown as B. 

(3) Drill these pilot-size holes full-size, 3,2 mm diameter. 

(4) At the four positions shown as B, install the bracket between stringers 8 and 9. Use: 

 - 4 rivets pn F0N2-6396B402 

Refer to figure 3. 

F. Install feedthrough halves pn WIF7057-001 to the fuel pipe that runs through rib 4155, 

with these items: 

 - 2 feedthrough halves pn WIF7057-001 

 - 1 cable tie pn MS3367-1-9 

Refer to figure 5. 

G. Install bracket pn WIF7039-009 to the structure as follows: 

(1) Remove one rivet from the four positions shown as C. 

(2) Temporarily install bracket pn WIF7039-009 to structure. 

(3) Transfer-drill one hole, 4,0 mm diameter, from the structure into the bracket at the 

four positions shown as C. 

(4) At the four positions shown as C, install the bracket to the structure with these items: 

 - 4 rivets pn F0N2-6324S05 

(5) Install these items into the two hole positions shown as D. 

 - 2 screws pn NAS1133-2 

 - 4 washers pn AN960KD10 

 - 2 nuts pn MS21042L3. 

H. Install bracket pn WIF7039-403 or pn F8423-085-407 to bracket pn WIF7039-009 as 

follows: 

(1) Install leather pn F0N1-4550-1-1-5 to bracket pn WIF7039-403 or pn F8423-085-407. 

Use: 

 - Adhesive Simson 1000 (material no. Fk08-035). 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 12 Revision 1, Sep 15/10 

(2) Install bracket pn WIF7039-403 or pn F8423-085-407 to bracket pn WIF7039-009. 

Use: 

 - 2 plates pn WIF7039-007 or pn F8423-085-007 

 - 1 nut pn MS21042L4 

 - 1 nut pn NAS509-4. 

Refer to figure 6. 

I. Install two brackets pn WIF7039-013 to the structure as follows: 

(1) Remove one rivet from the six positions shown as E. 

(2) Temporarily install the brackets to the structure. 

(3) Transfer-drill one hole, 4,8 mm diameter, from the stringer into the bracket at the six 

positions shown as E. 

(4) Mark out and drill two holes, 6,5 mm diameter, to a tolerance of H13, through the 

brackets at the positions shown. 

(5) At the six positions shown as E, install the two brackets to the structure. Use: 

 - 6 hiloks pn F0N18-1221-6-5 

 - 6 collars pn F0N18-2230-6. 

Refer to figure 7. 

J. Install bracket pn WIF7039-415 (-417) to rib 3600 on the nacelle center line as follows: 

(1) Temporarily install the bracket to the structure. 

(2) Transfer-drill one pilot-size hole, from the bracket into the structure, at the two 

positions shown as G. 

(3) Drill these pilot-size holes full-size, 4,0 mm diameter. 

(4) Mark out and drill one hole, 4,0 mm diameter, at the two positions shown as H. 

(5) At the two positions shown as G and the two positions shown as H, install the bracket 

to the structure. Use: 

 - 4 rivets pn F0N 2-6324S05 

K. Install clamp pn WIF7039-407 or F8423-085-403 to bracket pn WIF7039-415 (-417) as 

follows: 

(1) Temporarily install the clamp to the bracket. 

(2) Mark out and drill one hole, 4,9 mm diameter to a tolerance of H13, at the two 

positions shown as J. 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 13 

(3) Remove and keep the clamp that you temporarily installed in step (1). 

Refer to figures 3 and 7. 

L. Install fuel pipe pn WIF7039-409 (-411) or pn F8423-107-409 (-411) as follows: 

(1) Position clamp pn WIF7039-407 or pn F8423-085-403 on fuel pipe pn WIF7039-409 

(-411) or pn F8423-107-409 (-411) 

(2) Remove the caps from the fuel lines. 

(3) Install fuel pipe pn WIF7039-409 (-411) or pn F842-107-409 (-411) Use: 

- 4 O-rings pn MS29513-218 and the items that you kept in steps B. (1) 

and B. (3). 

(4) Install clamp pn WIF7039-407 or pn F8423-085-403 to bracket pn WIF7039-415 (-

417) as follows: 

(a) Install leather pn F0N1-4550-1-1-5 to bracket pn WIF7039-415 (-417). Use: 

- Adhesive Simson 1000 (material no. Fk08-035). 

(b) Install clamp pn WIF7039-407 or pn F8423-085-403 to bracket pn WIF7039-415 

(-417). Use: 

- 2 bolts pn F0N2-1614V03-02 

- 2 nuts pn MS21042L3 

- 2 washers pn AN960-10L. 

- Sealing compound PR1436G-A (material no. Fk09-016). 

(5) Install the clamp to the fuel pipe with these items: 

 - 1 bolt pn F0N2-1614V04-15 

 - 1 nut pn MS21042L4 

 - 1 washer pn AN960-416L. 

Refer to figures 3 and 6. 

M. Install fuel pipe pn WIF7039-413 (-414) or F8423-112-407 (F8423-112-408) as follows: 

(1) Position clamp pn WIF7039-405 or pn F8423-085-405 on fuel pipe pn WIF7039-413 

(-414) or F8423-112-407 (F8423-112-408). 

(2) Remove the caps from the fuel lines. 

(3) Install fuel pipe pn WIF7039-413 (-414) or F8423-112-407 (-408) Use: 

 - 4 O-rings pn MS29513-218 and 2 couplings that you kept in step A.(1). 

(4) Install clamp pn WIF7039-405 or pn F8423-085-405 to the two brackets pn WIF7039-

013.Use: 

 - 2 washers pn AN960-416L 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 14 Revision 1, Sep 15/10 

 - 1 bolt pn F0N2-1614V04-29 

 - 1 nut pn MS21042L4. 

 - Sealing compound PR 1436G-A (material no. Fk09-016). 

NOTE: If there is a clearance between the clamp and the bracket it will be necessary 

to install an extra washer pn AN960-416L between them. 

Refer to figure 5. 

(5) Install half clamp pn WIF7039-005 or pn F8423-085-409 to bracket pn WIF7039-403 

or pn F8423-085-407 as follows: 

(a) Install leather pn F0N1-4550-1-1-5 to bracket pn WIF7039-005. Use: 

- Adhesive Simson 1000 (material no. Fk08-035). 

(b) Install half clamp pn WIF7039-005 or pn F8423-085-409 to bracket pn WIF 7039-

403 or pn F8423-085-407 with these items: 

- 2 bolts pn NAS1303-2 

- 3 washers pn AN960C10L 

- 2 nuts pn MS21042L3 

- 1 lock plate pn F0N2-3163-3. 

(6) Safety nut pn NAS509-4 to the lockplate with locking wire pn F0N1-7107-10 (material 

no. Fk05-048). 

Refer to figure 4. 

(7) Install clamp assembly pn F0N2-7323C20N to bracket pn WIF7039-401 with the 

items: 

 - 2 bolts pn NAS1303-3 

 - 2 washers pn AN960KD10L. 

N. Refuel the aircraft (Refer to the AMM, chapter 12-11-01). 

O. Examine the new fuel pipes for leaks. 

P. Install the access panels that you removed in “General”. 

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

area is clean. 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 15 

 The General Arrangement of the Fuel Pipes (Pre-Modification) 

 Figure 1 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 16 Revision 1, Sep 15/10 

The General Arrangement of the Fuel Pipe Supports (Pre-Modification) 

 Figure 2 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 17 

 The General Arrangement of the Fuel Pipes (Post-Modification) 

 Figure 3 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 18 Revision 1, Sep 15/10 

 

The Installation of the Bracket for Fuel Pipe pn WIF7039-413 or F8423-112-407 

 Figure 4 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 19 

The Installation of the Bracket and Half Clamp for Fuel Pipe pn WIF7039-413 or F8423-112-407

 Figure 5 
Service Bulletin 

Fokker 50/60 

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. 

SBF50-28-031 May 20/10 

Page 20 Revision 1, Sep 15/10 

The Installation of the Clamp for Fuel Pipe pn WIF7039-413 or F8423-112-407 

 Figure 6 
Service Bulletin 

Fokker 50/60 

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. 

May 20/10 SBF50-28-031 

Revision 1, Sep 15/10 Page 21 

The Installation of the Clamp for Fuel Pipe pn WIF7039-409 or F8423-107-409 

 Figure 7 
Manual Change Notification – Maintenance Documentation 

Fokker 50/60 

SEP 15/10 MCNM F50-071 REV 1 

Page 1 of 4 

MCNM-F50-071 REV 1 

Subject : Fuel – Inspection of the Fuel Pipes in the Nacelle, and if necessary, the Installation 

of Four New Fuel Pipes. 

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 SBF50-28-028 and SBF50-28-031. 

Reason for 

Revision : CDCCL affected sections in AMM Task 32-30-00-710-815 are not applicable to 

aircraft which are in the Post SBF50-28-031 configuration. In addition, a new AMM 

Task is introduced for replacement of the fuel-pipes that are in the Pre SBF50-28-

031 configuration. 

Effectivity : Refer to SBF50-28-028 and SBF50-28-031. 

 

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 Illustrated Parts Catalogue (IPC). 

 

Change Note : AMM

 If your aircraft stays in the Pre SBF50-28-031 configuration, then update AMM 

Task 32-30-00-710-815-A, as follows: 

- Add the text (CDCCL) in front of the title of the Task 

- Add the following Notes below the title of the Task: 

- Add this new Subtask before Subtask 32-30-00-001-205-A00: 
Manual Change Notification – Maintenance Documentation 

Fokker 50/60 

SEP 15/10 MCNM F50-071 REV 1 

Page 2 of 4 

- Add this new Subtask after Subtask 32-30-00-001-355-A00: 

- Add a new Fig. 32-30-00-990-015-A00 at the end of the Task, as shown on 

Figure 1 of this MCN. 

 If your aircraft stays in the Pre SBF50-28-031 configuration, then add a new Task 

28-16-00-200-816-A, and do as follows: 

- Use this title for the new Task: 

 

 Check of the Clearance between the Fuel Pipe Installation in the Nacelle and the 

Main Landing Gear Installation 

- Add this text below the title of the new Task: 

This maintenance procedure affects Fuel Tank Safety. It is related to a fuel system ALI 

(Airworthiness Limitation Item). Strictly adhere to the contents of this task to make sure 

that unsafe conditions do not develop. 

- Make a copy of all Subtasks given in the updated AMM Task 32-30-00-710-

815-A (including the change notes of this MCN) 

- Delete the copied Subtasks 32-30-00-001-275-A00 thru 32-30-00-001-305-

A00 from the new Task 

- Re-identify all copied Subtasks, to comply with the identification of the new 

Task 

- At the end of the new Task, add a new Fig. 28-16-00-990-016-A00 as 

shown on Figure 1 of this MCN. 
Manual Change Notification – Maintenance Documentation 

Fokker 50/60 

SEP 15/10 MCNM F50-071 REV 1 

Page 3 of 4 

 If your aircraft stays in the Pre SBF50-28-031 configuration, then add a new Task 

28-16-00-300-812-A, and do as follows: 

- Use this title for the new Task: 

 (CDCCL) Replacement of Transfer-lines in the Nacelle between STA 2574 and STA 4052

- Add this text below the title of the new Task: 

NOTE: This Task gives an abbreviated procedure for replacement of the fuel pipes that are in the 

Pre SBF50-28-031 configuration. 

- Use this procedure for the new Task: 

WARNING: OBEY THE SAFETY PRECAUTIONS GIVEN IN 28-00-00-610-813. JET FUEL IS 

EXPLOSIVE AND POISONOUS. 

A. Defuel the LH (RH) main tank (Refer to Task 12-11-01-650-813 for more data). 

B. Remove the access panel 925AZ (926AZ). 

C. Replace the fuel pipe(s) (Refer to IPC 28-16-04-01 for more details). 

NOTE: Start of Fuel System CDCCL affected section. 

D. Do a check of the clearance between the main landing gear and the fuel pipes (Refer to 

Task 32-70-00-710-815 for more data). 

NOTE: End of Fuel System CDCCL affected section. 

E. Refuel the LH (RH) main tank (Refer to Task 12-11-01-650-813 for more data). 

F. Examine the fuel pipe(s) that you installed, for leaks. 

G. Install the access panel 925AZ (926AZ). 

 IPC

 If applicable, update the fuel pipe installation in IPC Figure 28-16-04-01, in accordance 

with SBF50-28-031. 

NOTE: If you have a Documentation Revision Service (DRS) with Fokker Services, this 

information will be included into your manuals at the earliest opportunity. 

NOTE: MCNM-F50-071 Revision 1 supersedes MCNM-F50-071, dated MAY 20/10. 

Text highlighted by a revision bar indicates: 

- A revision of the text introduced with the original issue of this MCN 

- An introduction of new changes. 

Text not highlighted by a revision bar was already included in the original issue of this 

MCN and is not revised. It is retained for clarity. 
Manual Change Notification – Maintenance Documentation 

Fokker 50/60 

SEP 15/10 MCNM F50-071 REV 1 

Page 4 of 4 

Fuel Pipe Installation in Nacelle – Check 

Figure 1