## Service Bulletin Fokker Services B.V.

Prepared Function / Note Date uitvlugt-tu02571 Feb 19/14 General Check aroon.siriphant S/TFSE Feb 20/14 Manager Final Approval aroon.siriphant S/TFSE Mar 05/14 Office of Airworthiness Approval visser-hv01800 S/TW Mar 06/14

Status: Released Revision: 1 Released date: ( Mmm dd/yy ) Mar 06/14 Security class: UNCLASSIFIED F27 Proforma SB no.: SBF27-28-072

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 there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V. EASA approved procedure for electronic sign-off 

## F27 Proforma SB

SBF27-28-072

Revision 1

FUEL - GENERAL

The Introduction of Improved Bonding Provisions outside the Fuel Tanks

## Service Bulletin Fokker F27

Nov 28/13 SBF27-28-072 Revision 1, Mar 06/14 Proforma 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 there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V. Proforma

FUEL

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

General – The Introduction of Improved Bondi ng Provisions outside the Fuel Tanks.

1. Planning Information
A. Effectivity
(1) F27 Mark 200, 300, 400, 500, 600, 700 aircraft:
All serial numbers. NOTE: Fuel Tank Safety program is not applicable to F27 Mark 100.
(2) Production version of this modification: Not applicable.
B. Concurrent Requirements
(1) Not applicable.

C. Reason
(1) The Design Review of the F27 Mark 200/300/400/500/600/700 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 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 do not require opening of the fuel tanks access panels.

Page 1 2 3 4 5

Revision 1 1 1 1 1

## Service Bulletin Fokker F27

SBF27-28-072 Nov 28/13 Proforma Revision 1, Mar 06/14 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 there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V. Reason for Revision
(1) This revision is made to:
- Remove the bonding improvement of the Sniffle Valve lines in the Description and in Figure 1. This bonding improvement is included in Revision 1 of SBF27-28-071, because it also requires access inside the fuel tank.
D. Description
(1) An Appendix to this Proforma Service Bulletin will tell you how to install extra or improved bonding outside the fuel tanks to the Ventilation lines. For an impression of the bonding improvement see Figure 1.
E. Compliance
(1) Recommended.
Fokker Services recommends the accomplishment of this Service Bulletin within 2 years (24 months) after the issue date of the original 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.

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 nr. EASA.21J.059.
G. Manpower
(1) Approximately 8 man-hours are necessary to do this modification on one aircraft. The elapsed time will be 4 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: Nil Index change: 0.000.

I. Electrical Load Data

## Service Bulletin Fokker F27

Nov 28/13 SBF27-28-072 Revision 1, Mar 06/14 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 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 there in for purposes other than explicitly allowed by the aforesaid agreement, is not permitted except with the prior written permission of Fokker Services B.V. (1) Not changed

J. Software Accomplishment Summary
(1) Not applicable.

K. References
(1) The modification is covered by Fokker internal reference ECR15137.

L. Publications Affected
(1) This SB affects the publications listed below:
(a) Maintenance Documentation

Not affected.
- F27 Maintenance Manual (MM)

NOTE : The Manual Change Notification – Maintenance Documentation will be attached to each Appendix to this Proforma Service Bulletin.
(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 - Fuel Tank Safety (FTS) X -

NOTE: If “YES” the changed ICA will be described in an attachment to each Appendix to this Proforma Service Bulletin.
(d) Operational Documentation

Not affected.
(2) For incorporation of this Service Bulletin in your documentation refer to SBF27-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service Bulletins in Documentation of Fokker Services").
M. Interchangeability or Intermixability of Parts
(1) Not applicable.

## Service Bulletin Fokker F27

SBF27-28-072 Nov 28/13 Proforma Revision 1, Mar 06/14 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 there in 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) 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.
(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.

## Service Bulletin Fokker F27

Nov 28/13 SBF27-28-072 Revision 1, Mar 06/14 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 there in 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 1: Bonding Improvement of Ventilation Lines BONDING IMPROVEMENT OF THE VENTILATION LINES TO STRUCTURE