Proforma 

Service Bulletin 

Fokker F28 

This Service Bulletin 

supersedes the 

instructions in 

SBF28-28-047 with 

regard to the 

installation of bonding 

on the main tank level 

control pilot valve 

conduit. 

"This Service Bulletin is associated with the Fuel Tank Safety Program" 

Fuel System - Introduction of improved Bonding Provisions inside the Fuel Tanks 

1. Planning Information 

A. Effectivity 

(1) F28 aircraft serial numbers: 

11003 thru 11241 

11991 and 11992 

(2) Production version of this modification: Not applicable. 

B. Concurrent Requirements 

(1) At the same time as you do this SB, it is convenient to do: 

SBF28-57-098: Rework of the Holes in the Outer Wing Upper Skin Panel 

Reinforcement Structure for the Outer Wing Fuel Quantity Tank Units. 

I Page 

Jan 09/14 SBF28-28-058 

Proforma 

Page 1 

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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 8 V 
Service Bulletin 

Fokker F28 

C. Reason 

(1) The design review of the F28 Mk 1000 thru 4000 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 because no controlled bonding provisions 

are present on a number of critical locations, inside the Fuel Tank or connected to the 

Fuel Tank Wall. 

(2) This Service Bulletin gives instructions for the introduction of additional electrical 

bonding provisions that require opening of the fuel tank access panels. 

D. Description 

(1) An Appendix to this Proforma Service Bulletin will tell you how to install extra or 

improved bonding inside the fuel tanks to the : 

- Transfer Jet Pumps. 

For an impression of the items to be bonded see Figure 1. 

Ventilation Float Valves. 

For an impression of the items to be bonded see Figure 2 and 3. 

CWT Overflow Valves. 

For an impression of the items to be bonded see Figure 4. 

Level Control Pilot Valves Wiring Conduit (if pre SBF28-28-047). 

For an impression of the items to be bonded see Figure 5. 

Fuel Quantity Tank Unit (FQTU) no. 7 mounting flange (if pre SBF28-57 -098). 

In figure 6 the position of FQTU number 7 is indicated, with an impression 

of the items to be bonded. 

NOTE: For aircraft POST SBF28-57-098, the FQTU no. 7 mounting flange 

bonding is included in SBF28-28-059 

- FQTU no. 7 attachment screws (if pre SBF28-57 -098). 

In figure 6 the position of FQTU number 7 is indicated, with an impression 

of the items to be bonded. 

NOTE: For aircraft POST SBF28-57-098, the FQTU no. 7 attachment screws 

bonding is included in SBF28-28-059 

E. Compliance 

(1) Recommended . 

Fokker Services recommends the accomplishment of this Service Bulletin within 

7 years (84 months) after the issue date of this Service Bulletin. 

NOTE: Do this Part at a scheduled tank opening 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 

SBF28-28-058 

Proforma 

Page 2 

Jan 09/14 

Copyright All rights reserved by Fokker Services 8 V. (The Netherlands). This document has been supplied by Fokker Services B.V. to ~s 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 

Fokker F28 

website for the publication of a Proposed Airworthiness Directive for 

comments. 

NOTE: In view of the required compliance, please be aware of the Appendix lead 

time of 3 months 

F. Approval 

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

ref. EASA.21J.059. 

G. Manpower 

(1) Approximately 20 man-hours are necessary to do this modification on one aircraft. 

The elapsed time will be 10 hours for 2 men. 

Both mentioned figures are rough estimates. More detailed manpower information will 

be included in an Appendix to this Proforma Service Bulletin. 

H. Weight and Balance 

(1) Weight change: + 0,1 kg (0.22 I b) 

Index change: None 

I. Electrical Load Data 

(1) Not changed. 

J. Software Accomplishment Summary 

( 1) Not applicable. 

K. References 

(1) F28 Service Bulletin (SB): 

- SBF28-28-047 

- SBF28-28-059 

- SBF28-57-098 

Fokker internal reference: 

- ECR15105. 

L. Publications Affected 

(1) This SB affects the publications listed below: 

(a) Maintenance Documentation 

- F28 Maintenance Manual (MM) 

Jan 09/14 SBF28-28-058 

Proforma 

Page 3 

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V. to ~s customers on a confidential basis sub}ect 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 

Fokker F28 

NOTE: The Manual Change Notification - Maintenance Documentation will be 

attached to each Appendix to this Proforma Service Bulletin. 

(b) Maintenance Programs 

- F28 Customized Maintenance Program (CMP) 

NOTE: The affected maintenance program change is described in the 

paragraph Special Instructions for Continued Airworthiness (ICA) 

(c) Special Instructions for Continued Airworthiness (ICA 

The effect of this Service Bulletin on the speciaiiCA is as follows: 

YES 

- Electrical Wiring Interconnection System (EWIS) 

- Fuel Tank Safety (FTS) X 

NO 

X 

NOTE: If "YES" the changed ICA will be described in an attachment to each 

Appendix of this Proforma Service Bulletin. 

(d) Operational Documentation 

Not affected. 

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

SBF28-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service 

Bulletins in Documentation of Fokker Services"). 

M. Interchangeability or lntermixability of Parts 

(1) Not applicable. 

SBF28-28-058 

Proforma 

Page4 

Jan 09/14 

Copyright All rights reserved by Fokker Services B.V. (The Netherlands) This document has been supplied by Fokker Services B.V. to its customers on a confidential basis subject to the provisions of an agreement. Reproduction or disclosure to third parties of 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 'Nith the prior written permission of Fokker Services B.V. 
2. Materiallnformation 

A. Material - Price and Availability 

Service Bulletin 

Fokker F28 

(1) On request we will supply you a customized modification proposal including prices 

and lead-times. The estimated lead time of an Appendix to this Proforma Service 

Bulletin and Mod kit(s) is 3 months after we receive your order. 

(2) A customized modification proposal will include an approved Appendix (free of 

charge), mod kit(s) and revisions of the affected documentation (if applicable). 

(3) You can contact your Fokker Services Customer Support Manager for such a 

modification proposal. 

B. Material Required 

(1) Will be part of the Appendix and will comprise bonding leads, clamps and attaching 

materials. 

C. Tooling - Price and Availability 

( 1) Not applicable. 

D. Drawings Required 

(1) Will be part of the Appendix. 

3. Accomplishment Instructions 

A. Accomplishment Instructions will be included in each Appendix to this Proforma Service 

Bulletin. 

Jan 09/14 SBF28-28-058 

Proforma 

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 'Nith the prior written permission of Fokker Services 8 V. 
Figure1 

SBF28-28-058 

Proforma 

Page 6 

Bonding improvement of transfer jet pump. 

(in LH and RH wing) 

Service Bulletin 

Fokker F28 

PUMP 

I 

~-

Jan 09/14 

Copyright All rights reserved by Fokker Services B.V. (The Netherlands). This document has been supplied by Fokker Services B.V. to its customers on a confidential basis subject to the provisions of an agreement Reproduction or disclosure to third parties of 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 'Nit.h the prior written permission of Fokker Services B.V. 
Figure 2: 

Figure 3: 

Jan 09/14 

COL LECT OR TANK 

Location of Ventilation Float Valves 

(RH wing is mirror image) 

Location of bonding improvement of ventilation float valve. 

Service Bulletin 

Fokker F28 

SBF28-28-058 

Proforma 

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. 
' ' \ 

\ 

BONDING IMPROVEMENT 

FROM CWT OVERFLOW VALVE 

TO STRUCTURE 

VIEW A 

Figure 4: Bonding improvement of CWT Overflow Valve 

Service Bulletin 

Fokker F28 

SBF28-28-058 Jan 09/14 

Proforma 

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. 
Figure 5: 

Jan 09/14 

BONDING IMPROVEMENT 

FROM CONDUIT TO 

STRUCTURE 

VIEW A 

Bonding of Level Control Pilot Valve Conduit 

(RH wing is mirror image) 

Service Bulletin 

Fokker F28 

LEVEL CONTROL PILOT VALVE 

SBF28-28-058 

Proforma 

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. 
.. 

PROBE NUMBER 7 

BONDING IMPROVEMENT 

BETWEEN ATIACHMENT 

SCREWS AND 

PROBE MOUNTING FLANGE 

BONDING IMPROVEMENT 

BETWEEN PROBE 

MOUNTING FLANGE AND 

STRUCTURE 

Service Bulletin 

Fokker F28 

Figure 6: Bonding improvement of Fuel Quantity Indication System- probe no. 7. 

SBF28-28-058 

Proforma 

Page 10 

Jan 09/14 

Copyright All rights reserved by Fokker Services B.V. (The Netherlands) Tnis 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.