## 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 confiden tial basis subject to the provisions of an agreemen t. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

Page 1 2 3 4 5 6 7 8 9 10 Revision - - - - - - - - - - Jul 05/10 SBF50-33-038 Page 1 LIGHTS Emergency Lighting - The One Time Replacement of In sufficiently Bright Exit Signs
1. Planning Information A. Effectivity (1) F27 Mark 050 and 0502 aircraft serial numbers: 20104, 20105, 20121 thru 20123, 20130 thru 20135, 2 0141 thru 20145, 20150, 20156 thru 20176, 20178 thru 20180, 20182 th ru 20199, 20202, 20204 thru 20207, 20210, 20211, 20213 thru 20252, 2 0254 thru 20266, 20270 thru 20279, 20281, 20283 thru 20288, 20296 th ru 20303, 20306, 20307, 20312, 20313, 20316, 20317, 20328, 20331, 20 333 and 20335. (2) Production version of this modification: Not ap plicable. B. Concurrent Requirements (1) Not applicable. C. Reason (1) Fokker 50 aircraft have passenger compartment e xit signs installed to locate the emergency exits. A number of these signs are not el ectrically powered, but are self illuminated by means of a hydrogen isotope: Tritium . As this isotope decays over time, these signs will loose their brightness. (2) To remain compliant with regulations, Tritium e xit signs should be replaced when their brightness has deteriorated below accepted levels. (3) Currently the MRB/MPD does not include an inspe ction task for signs containing Tritium. This Service Bulletin requires a one-time inspection of all Tritium exit signs and the replacement of insufficiently bright signs. (4) The MRB document will be updated before July 20 11 to include an appropriate maintenance task to ensure that the signs meet the minimum brightness requirements. LIGHTS
Emergency Lighting - The One Time Replacement of In sufficiently Bright Exit Signs

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

SBF50-33-038 Jul 05/10 Page 2 D. Description (1) This Service Bulletin tells you how to: - Inspect the exit sign on the partition wall (temp orary removal of exit sign as necessary) - Replace the insufficiently bright exit sign - Discard the old exit sign in accordance with loca l regulations. (2) This Service Bulletin will provide two options to check the exit signs. (a) One option will be to check the manufacture dat e on the sign. In some cases this manufacture date will not be visible without the te mporary removal of the sign. (b) The second option will be the use of a comparat or tool to determine if the sign brightness is still above the minimum required valu e. E. Compliance (1) Recommended Fokker Services recommends the accomplishment of th is Service Bulletin within 6 months after the issue date of this Service Bulleti n. NOTE : It is expected that EASA will issue an Airworthin ess Directive (AD) with respect to this subject with the same compliance te rms. Refer to the EASA website for the publication of a Proposed Airworthi ness Directive for comments. F. Approval (1) The technical content of this document is appro ved by EASA or under the authority of DOA nr. EASA.21J.059. G. Manpower (1) Approximately 1 man-hour is necessary to do thi s Service Bulletin on one aircraft. This table of manpower will help you to schedule an d do this Service Bulletin: Instructions Men Man-hours Elapsed time (hours) Removal 1 0,5 0,5 Modification Inspection - - - Installation 1 0,5 0,5 Testing - - - Total 1,0 1,0 NOTE : This estimate does not include the time necessary for the paint to dry and/or the sealant to cure.

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

Jul 05/10 SBF50-33-038 Page 3 (2) The estimated hours are for direct labor done b y experienced personnel. They are calculated based on the conditions given in SBF50-0 0-001 (Service Bulletin Introduction, section 2.C., "Manpower"). H. Weight and Balance (1) Weight change: None Index change: None. I. Electrical Load Data (1) Not affected. J. Software Accomplishment Instructions (1) Not applicable. K. References (1) Fokker 50/60 Illustrated Parts Catalog (IPC) Fokker 50/60 Maintenance Review Board (MRB) documen t Fokker 50/60 Maintenance Planning Document (MPD) Fokker Consumable Material List (CML) Fokker internal reference: - ECR 015605. L. Publications Affected (1) This SB affects the publications listed below: (a) Maintenance Documentation
Not affected. (b) Maintenance Programs

- Fokker 50 Maintenance Review Board (MRB)

- Fokker 50 Maintenance Planning Document (MPD)

- Fokker 50 Customized Maintenance Program (CMP).

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

SBF50-33-038 Jul 05/10 Page 4 (c) Special Instructions for Continued Airworthines s (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 NOTE : If “YES”, when not already incorporated, the chan ged ICA will be incorporated in the MRB document within one calenda r year from the date of issue of this Service Bulletin. Until then, no actions are required. (d) Operational Documentation
Not affected. (2) For incorporation of this Service Bulletin in y our documentation refer to SBF50-00-001 (Service Bulletin Introduction, sectio n 4 "Incorporation of Service Bulletins in Documentation of Fokker Services"). M. Interchangeability or Intermixability of Parts (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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

Jul 05/10 SBF50-33-038 Page 5 2. Material Information A. Material – Price and Availability (1) You can order the necessary parts against list price. B. Material Required (1) These parts, which are necessary to complete th is Service Bulletin on 1 aircraft, are not part of the mod kit.
New Part Number Qty Keyword Info Old Part Number Instructions/ * 1 * 2 Disposition MEK AR** AR** Solvent Fk11-003*** - Local source AC30G 1* 1 Exit Sign English AC30-01C3 Discard AC30H 1* - Exit Sign Icelandic AC30-11C3 Discard AC30I 1* - Exit Sign French AC30-21C3 Discard AC30L 1* - Exit Sign Japanese AC30-51C3 Discard AC30M 1* - Exit Sign Malayan AC30-61C3 Discard AC30N 1* - Exit Sign German AC30-71C3 Discard AC300 1* - Exit Sign Sudanese AC30-81C3 Discard AC30R 1* - Exit Sign Norwegian AC30-101C3 Discard AC30T 1* - Exit Sign Spanish AC30-121C3 Discard AC30U 1* - Exit Sign Brazilian AC30-122C3 Discard AC30V 1* - Exit Sign Arabic AC30-131C3 Discard AC30Y 1* - Exit Sign Ethiopian AC30Y Discard

NOTES : * The required language (English, or English in c ombination with the national language) may be dependant on local regul ations. ** Use as much as required *** Refer to the CML for material numbers.

* 1 Applicable to aircraft serial numbers 20104, 20105 , 20121 thru 20123, 20130 thru 20135, 20141 thru 20145, 20150, 20156 t hru 20176, 20178 thru 20180, 20182 thru 20199, 20202, 20204 thru 20 207, 20210, 20211, 20213 thru 20252, 20254 thru 20266, 20270 thru 202 79, 20281, 20283 thru 20286, 20288, 20296 thru 20303, 20306, 20307, 20312, 20313, 20316, 20317, 20328, 20331, 20333 and 20335.

* 2 Applicable to aircraft serial number 20287. (2) These mod kit parts are necessary to do this Se rvice Bulletin on 1 aircraft. (a) Not applicable. C. Tooling – Price and Availability (1) You can order special tool pn DB-45-B3 at your Fokker Services Account Support Manager.

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

SBF50-33-038 Jul 05/10 Page 6 (2) You can contact your Fokker Services Account Su pport Manager for the price and

availability of this special tool. D. 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

Jul 05/10 SBF50-33-038 Page 7 3. Accomplishment Instructions General:

- For CML material number references, refer to “MyFok kerFleet.com/Documentation/CML”. WARNING : BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY

THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFE TY INSTRUCTIONS. Refer to IPC figure 33-52-03-02, or 33-52-03-08 (20 287 only) A. Inspect the Exit signs on the partition wall. (1) Inspect by checking the manufacturing date of t he signs, continue with step (2) OR Inspect by using the comparator tool, continue with step (3). (2) Inspect by checking the manufacturing date. (a) Remove the exit sign from the partition wall. R emove:

- 1 exit sign pn AC30-xxxC3 or AC30x. (b) Thoroughly clean the partition wall to remove a ll remaining glue. Use:

- AR solvent pn MEK (Fk11-003). (c) Check the manufacture date of the exit sign. Co ntinue with step B. (3) Inspect by using the comparator tool. (a) Turn off all lighting in the cabin area. Refer to figure 1. (b) Hold the padded flat plate of the comparator to ol against the illuminated area of the self-illuminated exit signs on the partition wa ll. Use:

- 1 comparator tool pn DB-45-B3 (250 micro-lamberts) (c) Visually check the illumination of the exit sig ns with the calibrated light source in the comparator tool. (d) Verify if the exit sign is brighter or weaker t han the calibrated light source of the comparator tool. (e) If necessary, return lighting in the cabin to t he previous setting.

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

SBF50-33-038 Jul 05/10 Page 8 B. Replace the insufficiently bright Exit signs. (1) The sign does not have to be replaced in case:

- the sign was manufactured less than 7 years ago, OR

- the sign brightness is found to be brighter than th e comparator tool. (a) If removed in step A.(2), re-install the sign o n the partition wall at the same location as previously used. Re-use:

- 1 exit sign pn AC30-xxxC3 or AC30x. NOTE : Use double sided tape, 3M Scotch 665 or equivalen t, to re-attach signs. (2) Replace the Exit signs in case:

- the manufacture date is not stated on the sign, OR

- the sign was manufactured more than 7 years ago, OR

- the sign is found to be weaker than the comparator tool. (a) If not already removed in step A.(2), remove th e sign from the partition wall. Remove:

- 1 exit sign pn AC30-xxxC3 or AC30x (discard). (b) Thoroughly clean the partition wall to remove a ll remaining glue. Use:

- AR solvent pn MEK (Fk11-003). (c) Install the new exit sign on the partition wall at the same location as previously used. Use:

- 1 exit sign AC30G English *

- 1 exit sign AC30H Icelandic *

- 1 exit sign AC30I French *

- 1 exit sign AC30L Japanese *

- 1 exit sign AC30M Malayan *

- 1 exit sign AC30N German *

- 1 exit sign AC300 Sudanese *

- 1 exit sign AC30R Norwegian *

- 1 exit sign AC30T Spanish *

- 1 exit sign AC30U Brazilian *

- 1 exit sign AC30V Arabic *

- 1 exit sign AC30Y Ethiopian * NOTE : Fasten the new sign with the double sided tape pr esent on the back of the sign. NOTE : * Determine the correct language (combination) ba sed on local

requirements.

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

Jul 05/10 SBF50-33-038 Page 9 (d) Discard the old exit sign.
1 The Exit signs contain Tritium (H3), a weak radioa ctive source. Discard the signs in accordance with local regulations, or cont act the vendor, Self Powered Lighting, in case no local nuclear waste di sposal agency/company is available. - http://www.self-powered.com/

## 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 confide ntial basis subject to the provisions of an agreeme nt. Reproduction or disclosure to third parties of this document or any part thereof, or the use of any in formation 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.

SBF50-33-038 Jul 05/10 Page 10 Comparator Tool pn DB-45-B3 (250 μ L). Figure 1