Service Bulletin 

Fokker 70/100 

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

Revision - - - - - - - - - - - - - - - - - 

Page 18 19 20 

Revision - - - 

Attachments PLL and PLS. For a detailed listing refer to page 6. 

Apr 23/13 SBF100-51-021 

Page 1 

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.

STANDARD PRACTICES AND STRUCTURES-GENERAL

General - The Introduction of Drain Tubes on the Center Wing Rear Spar 

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) In case of a water accumulation on the top of the center wing torsion box inside the 

cabin (zones 171 and 172), the water drains through the existing drain holes/gaps in 

the web plates on top of the center wing rear spar via the center wing rear spar area 

on the aileron control cables. With the freezing temperatures normally encountered 

during flight ice can accumulate on the aileron control cables resulting in limited 

aileron control. 

This modification provides drainage of the area on the top of the center wing torsion 

box in a location where drain water can not affect the aileron control. 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 2 

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.

D. Description 

(1) This Service Bulletin is divided into two parts as follows: 

Part 1: The Installation of Water Drain Tubes on the Center Wing Rear Spar in 

Aircraft with Center Wing Bag Tanks (Applicable to Aircraft Serial Numbers 

11244 thru 11441) 

This Part tells you how to: 

- remove the passenger seats at the location of the modification; 

- remove the carpet at the location of the modification; 

- remove the floor panels at the location of the modification; 

- clean the area of the modification; 

- prepare the water drain tube feed through holes in the affected 

web plates on top of the center wing rear spar; 

- install the water drain tubes and identification placards; 

- seal the existing drain gaps on top of the center wing torsion box; 

- reinstall the removed floor panels; 

- reinstall the removed carpet; 

- reinstall the removed passenger seats. 

Part 2: The Installation of Water Drain Tubes on the Center Wing Rear Spar in 

Aircraft with an Integral Center Wing Tank or Provisions for an Integral 

Center Wing Tank (Applicable to Aircraft Serial Numbers 11442 thru 11585) 

This Part tells you how to: 

- remove the passenger seats at the location of the modification; 

- remove the carpet at the location of the modification; 

- remove the floor panels at the location of the modification; 

- clean the area of the modification; 

- prepare the water drain tube feed through holes in the affected web 

plates on top of the center wing rear spar; 

- install the water drain tubes and identification placards; 

- reinstall the removed floor panels; 

- reinstall the removed carpet; 

- reinstall the removed passenger seats. 

E. Compliance 

(1) Recommended. 

Fokker Services recommends the accomplishment of this Service Bulletin within 3 

years after the date of issue of this Service Bulletin. 

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 

Apr 23/13 SBF100-51-021 

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. 

F. Approval 

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

EASA.21J.059. 

G. Manpower 

(1) Approximately 8,0 man-hours are necessary to do Part 1 or Part 2 of 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 2,0 2,0 

Modification 

Inspection 2 4,0 4,0 

Installation 2 2.0 2,0 

Testing - - - 

Total 8,0 8,0 

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 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 changed. 

J. Software Accomplishment Summary 

(1) Not applicable. 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 4 

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.

K. References 

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

Fokker 70/100 Structural Repair Manual (SRM) 

Fokker 70/100 Illustrated Parts Catalog (IPC) 

Fokker Consumable Material List (CML) 

Fokker Standards & Process Manual (SPM) 

Fokker internal reference(s): 

 - ECR 15937 

 - EMI 90523. 

L. Publications Affected 

(1) This SB affects the publications listed below: 

(a) Maintenance Documentation

- Fokker 70/100 Illustrated Parts Catalog (IPC) - chapter 11-21 

- chapter 27-64 

NOTE: See attached Manual Change Notification MCNM F100-160. 

(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: 

 YES NO

- Electrical Wiring Interconnection System (EWIS) - X 

- Fokker 70/100 Airworthiness Limitations Section (ALS): 

• Fuel Tank Safety (FTS) - X 

• Damage Tolerance of Fatigue Critical Structure - X 

• Certification Maintenance Requirements (CMR) - X 

NOTE: If “YES”, when not already incorporated, the changed ICA will be 

incorporated in the MRB, the Airworthiness Limitations Section (ALS) 

and/or the AMM document(s) within one calendar year from the date of 

issue of this Service Bulletin. Until then, no actions are required. 

(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. 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

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

(4) 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”). 

(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 Intermixability of Parts 

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

New Part Number Keyword Old Part Number Interchangeability

AS21919WCE4 Clamp MS21919WCE4 Two-way 

NAS6603-10 Bolt NAS1303-10 Two-way 

NAS6603-11 Bolt NAS1303-11 Two-way 

NAS6603-13 Bolt NAS1303-13 Two-way 

NAS6603-17 Bolt NAS1303-17 Two-way 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 6 

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.

2. Material Information

A. Material – Price and Availability 

(1) You can order the necessary parts as mod kits SB10051021-XU-A and 

SB10051021-XU-B. 

(2) You can contact your Fokker Services Customer Support Manager for the price and 

lead-time of this mod kit. 

B. Material Required 

(1) The parts, which are necessary to complete this Service Bulletin on 1 aircraft and are 

not part of the mod kit are described in attachment Part List Local (PLL). 

Material List Issue Description Aircraft Effectivity

SB10051021-XU-A B Parts List Local (PLL) 11244 thru 11261 and 

11268 thru 11275 

SB10051021-XU-B A Parts List Local (PLL) 11262 thru 11267 and 

11276 thru 11585

(2) The mod kit parts, which are necessary to do this Service Bulletin on 1 aircraft are 

described in attachment Part List Supply (PLS). 

Material List Issue Description Aircraft Effectivity

SB10051021-XU-A B Parts List Supply (PLS) 11244 thru 11261 and 

11268 thru 11275

SB10051021-XU-B A Parts List Supply (PLS) 11262 thru 11267 and 

11276 thru 11585

C. Tooling – Price and Availability 

(1) Not applicable. 

D. Drawings Required 

(1) Not applicable. 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

Page 7 

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. 

3. Accomplishment Instructions

General: 

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

select CML. 

- For Standards and Process Manual (SPM) references, refer to 

“MyFokkerFleet.com/Documentation” and select SPM. 

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

- For the application of sealing compound PS-870A (Fk09-016A) 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 application of Primer and Paint, refer to the AMM, chapter 51-21-00. 

- For drilling and dimpling procedures, refer to the SRM, chapter 51-21-02. 

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

THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFETY 

INSTRUCTIONS. 

Part 1: The Installation of Water Drain Tubes on the Center Wing Rear Spar in Aircraft with 

Center Wing Bag Tanks (Applicable to Aircraft Serial Numbers 11244 thru 11441) 

A. Preparation 

Refer to figure 1. 

(1) Remove the passenger seats on the LH and RH side of the cabin at the location 

above the center wing section (zone 171 and 172) where the outboard floor panels 

have to be removed. Refer to AMM Task 25-21-01-000-8XX-X. 

(2) Remove the carpet on the LH and RH side of the cabin at the location above the 

center wing section (zone 171 and 172) where the outboard floor panels have to be 

removed. Refer to AMM Task 25-25-00-000-8XX-X. 

(3) Remove floor panels 281BZ and 282CZ as indicated in figure 1 per 

AMM Task 53-71-01-000-8XX-X. 

Refer to figure 2. 

(4) Clean the center wing area at the location of the modification, including the existing 

drain gaps. Use: 

- AR Lint-free cloth Fk05-044 

- AR Methyl Ethyl Ketone (or equivalent) Fk11-003 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 8 

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.

B. Modification 

Refer to figure 2. 

(1) Remove the rivet on the LH and RH side as indicated in figure 2 and enlarge the rivet 

holes to 7.0 (-0/+0.2) mm diameter. 

(2) Treat the bare edges of both holes with conversion coating and primer. Use: 

- AR Coating, conversion Alodine 1201 Fk13-003D 

- AR Primer, Aerodur Aerodur S15/60 Fk07-008 

Refer to figures 2, 4, 5, 6, 7 and 8. 

(3) Temporarily install water drain tube pn W33021-001 on the LH side and water drain 

tube pn W33021-003 on the RH side. Use: 

- 1 Tube, LH water drain pn W33021-001 

- 1 Tube, RH water drain pn W33021-003 

NOTE: If required, carefully bend the tube to ensure a stress free fit. 

(4) Mark both tube ends at a distance of approximately 10 mm measured from the web 

plate on top of the center wing rear spar as shown in figure 6. 

(5) Cut-off the tube ends on the correct length and threat the reworked edges with 

conversion coating. Use: 

- AR Coating, conversion Alodine 1201 Fk13-003D 

(6) Remove the existing bolts and washers in the clamp blocks of the hydraulic lines on 

the LH side in the center wing rear spar area as shown in figures 4 and 7. Discard: 

- 2 Bolts pn NAS1303-10 or 

pn NAS1303-16 

Discard 

- 2 Washers pn NAS1252-10L Discard 

(7) Install the water drain tube on the LH side in the center wing rear spar area with the 

clamps as shown in figure 4, Detail X. Refer to figure 7 for applicable mounting 

hardware. Use: 

- 1 Tube, LH water drain pn W33021-001 

- 2 Clamps pn AS21919WCE4 

- 2 Bolts pn NAS6603-11 *1 

- 2 Bolts pn NAS6603-17 *2 

- 2 Washers pn NAS1252-10L 

NOTES: *1 Applicable to aircraft sn 11262 thru 11267 and 11276 thru 11441. 

 *2 Applicable to aircraft sn 11244 thru 11261 and 11268 thru 11275. 

(8) Remove the existing bolt and washer in the clamp block of the hydraulic lines on the 

RH side in the center wing rear spar area as shown in figures 4 and 7. Discard: 

- 1 Bolt pn NAS1303-10 or 

pn NAS1303-12 

Discard 

- 1 Washer pn NAS1252-10L Discard 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

Page 9 

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. 

(9) Install the water drain tube on the RH side in the center wing rear spar area with the 

clamps and clamping blocks as shown in figure 5, Detail X and Y. Refer to figures 7 

and 8 for applicable mounting hardware for upper and lower attachment respectively. 

Use: 

- 1 Tube, RH water drain pn W33021-003 

- 2 Clamping blocks pn A71052-077 

- 2 Clamps pn AS21919WCE4 

- 2 Bolts pn NAS6603-10 

- 1 Bolt pn NAS6603-11 *1 

- 2 Bolts pn NAS6603-11 *2 

- 1 Bolt pn NAS6603-13 *1 

- 7 Washers pn NAS1252-10L 

- 3 Nuts pn MS21042L3 

NOTES: *1 Applicable to aircraft sn 11244 thru 11261 and 11268 thru 11275. 

 *2 Applicable to aircraft sn 11262 thru 11267 and 11276 thru 11441. 

(10) Apply sealing compound around both water drain tubes at the feed through holes in 

the web plates on top of the center wing rear spar as shown in figure 6. Use: 

- AR Sealing compound pn PS870A Fk09-016A 

(11) Close the existing drain gaps on top of the center wing torsion box with sealing 

compound as shown in figure 2. Use: 

- AR Sealing compound pn PS870A Fk09-016A 

(12) Install the water drain tube identification placards on the locations shown in figures 4 

and 5, Detail B. Use: 

- 2 Placards, identification pn W33022-001 

(13) Apply a protective layer on the identification placards. Use: 

- AR Coating, protective pn Nycote 88 Fk09-008 

C. Completion of the work 

Refer to figure 1. 

(1) Reinstall floor panels 281BZ and 282CZ as indicated in figure 1 per 

AMM Task 53-71-01-400-8XX-X. 

(2) Reinstall the carpet on the LH and RH side of the cabin at the location above the 

center wing section (zone 171 and 172) where the outboard floor panels have been 

removed. Refer to AMM Task 25-25-00-400-8XX-X. 

(3) Reinstall the passenger seats on the LH and RH side of the cabin at the location 

above the center wing section (zone 171 and 172) where the outboard floor panels 

have been removed. Refer to AMM Task 25-21-01-400-8XX-X. 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 10 

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.

Part 2: The Installation of Water Drain Tubes on the Center Wing Rear Spar in Aircraft with 

an Integral Center Wing Tank or Provisions for an Integral Center Wing Tank 

(Applicable to Aircraft Serial Numbers 11442 thru 11585) 

A. Preparation 

Refer to figure 1. 

(1) Remove the passenger seats on the LH and RH side of the cabin at the location 

above the center wing section (zone 171 and 172) where the outboard floor panels 

have to be removed. Refer to AMM Task 25-21-01-000-8XX-X. 

(2) Remove the carpet on the LH and RH side of the cabin at the location above the 

center wing section (zone 171 and 172) where the outboard floor panels have to be 

removed. Refer to AMM Task 25-25-00-000-8XX-X. 

(3) Remove floor panels 281BZ and 282CZ as indicated in figure 1 per 

AMM Task 53-71-01-000-8XX-X. 

Refer to figure 3. 

(4) Clean the center wing area at the location of the modification. Use: 

- AR Lint-free cloth Fk05-044 

- AR Methyl Ethyl Ketone (or equivalent) Fk11-003 

B. Modification 

Refer to figure 3. 

(1) Carefully enlarge the existing drain holes to 7.0 (-0/+0.2) mm diameter on the LH and 

RH side as indicated in figure 3. 

NOTE: Do not damage the upper side of the center wing section. 

(2) Treat the bare edges of both holes with conversion coating and primer. Use: 

- AR Coating, conversion Alodine 1201 Fk13-003D 

- AR Primer Aerodur S15/60 Fk07-008 

Refer to figures 3, 4, 5, 6, 7 and 8. 

(3) Temporarily install water drain tube pn W33021-001 on the LH side and water drain 

tube pn W33021-003 on the RH side. Use: 

- 1 Tube, LH water drain pn W33021-001 

- 1 Tube, RH water drain pn W33021-003 

NOTE: If required, carefully bend the tube to ensure a stress free fit. 

(4) Mark the tube ends at a distance of approximately 10 mm measured from web plate 

on top of the center wing rear spar as shown in figure 6. 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

Page 11 

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. 

(5) Cut-off the tube ends on the correct length and threat the reworked edges with 

conversion coating. Use: 

- AR Coating, conversion Alodine 1201 Fk13-003D 

(6) Remove the existing bolts and washers in the clamp blocks of the hydraulic lines on 

the LH side in the center wing rear spar area as shown in figures 4 and 7. Discard: 

- 2 Bolts pn NAS1303-10 Discard 

- 2 Washers pn NAS1252-10L Discard 

(7) Install the water drain tube on the LH side in the center wing rear spar area with the 

clamps as shown in figure 4, Detail X. Refer to figure 7 for the applicable mounting 

hardware. Use: 

- 1 Tube, LH water drain pn W33021-001 

- 2 Clamps pn AS21919WCE4 

- 2 Bolts pn NAS6603-11 

- 2 Washers pn NAS1252-10L 

(8) Remove the existing bolt and washer in the clamp block of the hydraulic lines on the 

RH side in the center wing rear spar area as shown in figures 5 and 7. Discard: 

- 1 Bolt pn NAS1303-10 Discard 

- 1 Washer pn NAS1252-10L Discard 

(9) Install the water drain tube on the RH side in the center wing rear spar area with the 

clamps and clamping blocks as shown in figure 5, Detail X and Y. Refer to figures 7 

and 8 for applicable mounting hardware for the upper and lower attachment 

respectively. Use: 

- 1 Tube, RH water drain pn W33021-003 

- 2 Clamping blocks pn A71052-077 

- 2 Clamps pn AS21919WCE4 

- 2 Bolts pn NAS6603-10 

- 2 Bolts pn NAS6603-11 

- 7 Washers pn NAS1252-10L 

- 3 Nuts pn MS21042L3 

(10) Apply sealing compound around both water drain tubes at the feed through holes in 

the web plates on top of the center wing rear spar as shown in figure 6. Use: 

- AR Sealing compound pn PS870A Fk09-016A 

(11) Install the water drain tube identification placards on the positions shown in figures 4 

and 5, Detail B. Use: 

- 2 Placards, identification pn W33022-001 

(12) Apply a protective layer on the identification placards. Use: 

- AR Coating, protective pn Nycote 88 Fk09-008 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 12 

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.

C. Completion of the work 

Refer to figure 1. 

(1) Install floor panels 281BZ and 282CZ as indicated in figure 1 per 

AMM Task 53-71-01-400-8XX-X. 

(2) Install the carpet on the LH and RH side of the cabin at the location above the center 

wing section (zone 171 and 172) where the outboard floor panels have been 

removed. Refer to AMM Task 25-25-00-400-8XX-X. 

(3) Install the passenger seats on the LH and RH side of the cabin at the location above 

the center wing section (zone 171 and 172) where the outboard floor panels have 

been removed. Refer to AMM Task 25-21-01-400-8XX-X. 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

Page 13 

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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. 

Removal of Outboard Floor Panels 261BZ and 282CZ above Zone 171 and 172 (shaded area). 

Figure 1 

 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 14 

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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.

Water Drain Tube Hole in the Web Plate on Top of the Center Wing Rear Spar 

(applicable to aircraft sn 11244 thru 11441). 

Figure 2 

Water Drain Tube Hole in the Web Plate on Top of the Center Wing Rear Spar 

(applicable to aircraft sn 11442 thru 11585). 

Figure 3 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

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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. 

Water Drain Tube Installation on the LH Side of the Center Wing Rear Spar. 

Figure 4 

 

Section A-A, refer to figure 6. 

Detail X, refer to figure 7. 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

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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.

Water Drain Tube Installation on the RH Side of the Center Wing Rear Spar. 

Figure 5 

 

Section A-A, refer to figure 6 

Detail X, refer to figure 7 

Detail Y, refer to figure 8 
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

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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. 

Application of Sealant around the Water Drain Tube at the Hole in the Web Plate 

on Top of the Center Wing Rear Spar 

(Section A-A of figures 4 and 5). 

Figure 6 
Service Bulletin 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

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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.

Water Drain Tube Installation on the LH and RH Side according to Detail X of Figures 4 and 5. 

Figure 7 

DETAIL X
Service Bulletin 

Fokker 70/100 

Apr 23/13 SBF100-51-021 

Page 19 

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. 

Water Drain Tube Installation on the RH side according to Detail Y of Figure 5. 

Figure 8 

DETAIL Y
Service Bulletin Reporting Quality Form 

Fokker 70/100 

SBF100-51-021 Apr 23/13 

Page 20 

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 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 4 

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

b) Quality rating of the Planning Information □ □ □ □

c) Quality rating of the Material Information □ □ □ □

d) Quality rating of the Accomplishment Instructions □ □ □ □

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

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

g) Timely delivery of the SB □ □ □ □

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: Date:

Name / 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 
Parts List Local (PLL) 

All rights reserved. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any 

information contained therein for purpose other than provided for by this document, is not permitted without prior and 

express written permission of Fokker Services B.V. EASA approved procedure for electronic sign-off 

Keyword : MODKITDescription : DRAIN TUBESProgram : F28

Rel. to EB/SB : SBF100-51-02Rel. to EB/SB Issue : - Part Release Date : 10-04-2013

AssemblyPart Number Rev Seq Keyword DescriptionSB10051021-XU-B A 1 MODKIT DRAIN TUBESAssembly StructureQty UoM Part Number Keyword Info Old Part Number AR 5-701-1 PRIMER CML Fk07-008 - AR 5-721-1-064095 ENAMEL CML Fk07-027 - AR 5-943-2 COMPOUND CML Fk09-008 - AR 5-951-6 SEALANT CML Fk09-016A - AR AL0DINE1201 COATING CML Fk13-003D - Full Part NumbersPart Number Full Part NumberAL0DINE1201 ALODINE1201
Parts List Supply (PLS) 

All rights reserved. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any 

information contained therein for purpose other than provided for by this document, is not permitted without prior and 

express written permission of Fokker Services B.V. EASA approved procedure for electronic sign-off 

Keyword : MODKITDescription : DRAIN TUBESProgram : F28

Rel. to EB/SB : SBF100-51-02Rel. to EB/SB Issue : - Part Release Date : 10-04-2013

AssemblyPart Number Rev Seq Keyword DescriptionSB10051021-XU-B A 1 MODKIT DRAIN TUBESAssembly StructureQty UoM Part Number Keyword Info Old Part Number 2 ea A71052-077 BLOCK - - 4 ea AS21919WCE4 CLAMP - - 3 ea MS21042L3 NUT - - 9 ea NAS1252-10L WASHER - - 2 ea NAS6603-10 BOLT - - 4 ea NAS6603-11 BOLT - NAS1303-10 1 ea W33021-001 TUBE - - 1 ea W33021-003 TUBE - - 2 ea W33022-001 PLACARD - - 
Parts List Local (PLL) 

All rights reserved. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any 

information contained therein for purpose other than provided for by this document, is not permitted without prior and 

express written permission of Fokker Services B.V. EASA approved procedure for electronic sign-off 

Keyword : MODKITDescription : DRAIN TUBESProgram : F28

Rel. to EB/SB : SBF100-51-02Rel. to EB/SB Issue : - Part Release Date : 10-04-2013

AssemblyPart Number Rev Seq Keyword DescriptionSB10051021-XU-A B 1 MODKIT DRAIN TUBESAssembly StructureQty UoM Part Number Keyword Info Old Part Number AR 5-701-1 PRIMER CML Fk07-008 - AR 5-721-1-064095 ENAMEL CML Fk07-027 - AR 5-943-2 COMPOUND CML Fk09-008 - AR 5-951-6 SEALANT CML Fk09-016A - AR AL0DINE1201 COATING CML Fk13-003D - Full Part NumbersPart Number Full Part NumberAL0DINE1201 ALODINE1201
Parts List Supply (PLS) 

All rights reserved. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any 

information contained therein for purpose other than provided for by this document, is not permitted without prior and 

express written permission of Fokker Services B.V. EASA approved procedure for electronic sign-off 

Keyword : MODKITDescription : DRAIN TUBESProgram : F28

Rel. to EB/SB : SBF100-51-02Rel. to EB/SB Issue : - Part Release Date : 10-04-2013

AssemblyPart Number Rev Seq Keyword DescriptionSB10051021-XU-A B 1 MODKIT DRAIN TUBESAssembly StructureQty UoM Part Number Keyword Info Old Part Number 2 ea A71052-077 BLOCK - - 4 ea AS21919WCE4 CLAMP - - 3 ea MS21042L3 NUT - - 9 ea NAS1252-10L WASHER - - 2 ea NAS6603-10 BOLT - - 1 ea NAS6603-11 BOLT - - 1 ea NAS6603-13 BOLT - NAS1302-12 2 ea NAS6603-17 BOLT - NAS1303-16 1 ea W33021-001 TUBE - - 1 ea W33021-003 TUBE - - 2 ea W33022-001 PLACARD - - 
Manual Change Notification – Maintenance Documentation 

Fokker 70/100 

APR 23/13 MCNM F100-160 

Page 1 of 1 

MCNM-F100-160 

Subject : Drains - Introduction of Water Drain Tubes on the Rear-Spar of the Center-Wing. 

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 SBF100-51-021. 

Effectivity : Refer to SBF100-51-021. 

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 Illustrated Parts Catalogue (IPC). 

 

Change Note : IPC

 Update IPC 11-21-02-30, to show: 

- The location of the two placards (Part number W33022-001) as shown on 

Figures 4 and 5 of SBF100-51-021 

- The details of the two placards (Part number W33022-001) as given on drawing 

W33022 which is attached to SBF100-51-021. 

 Update IPC 27-64-11-04 thru -04F (as applicable), to show: 

- The modified clamp-block installations (See Detail X) as shown on the Figures 

4, 5 and 7 of SBF100-51-021 

- The new clamp-block installation (See Detail Y) as shown on the Figures 5 and 

8 of SBF100-51-021. 

 Add a new Figure in IPC Chapter 53-78-10, to introduce: 

- The new drain tubes (Part numbers W33021-001 and W33021-003) on the rearspar of the center-wing (Zone 170/180), as shown on the Figures 4 and 5 of 

SBF100-51-021 

- A reference to IPC 27-64-11-04 for the clamp-block supports. 

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

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