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. 

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 Insufficiently 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, 20141 thru 20145, 

20150, 20156 thru 20176, 20178 thru 20180, 20182 thru 20199, 20202, 

20204 thru 20207, 20210, 20211, 20213 thru 20252, 20254 thru 20266, 

20270 thru 20279, 20281, 20283 thru 20288, 20296 thru 20303, 20306, 

20307, 20312, 20313, 20316, 20317, 20328, 20331, 20333 and 20335. 

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

B. Concurrent Requirements 

(1) Not applicable. 

C. Reason 

(1) Fokker 50 aircraft have passenger compartment exit signs installed to locate the 

emergency exits. A number of these signs are not electrically 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 exit signs should be replaced when their 

brightness has deteriorated below accepted levels. 

(3) Currently the MRB/MPD does not include an inspection 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 2011 to include an appropriate 

maintenance task to ensure that the signs meet the minimum brightness 

requirements. 

LIGHTS

Emergency Lighting - The One Time Replacement of Insufficiently 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 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. 

SBF50-33-038 Jul 05/10 

Page 2 

D. Description 

(1) This Service Bulletin tells you how to: 

- Inspect the exit sign on the partition wall (temporary removal of exit sign as 

necessary) 

- Replace the insufficiently bright exit sign 

- Discard the old exit sign in accordance with local regulations. 

(2) This Service Bulletin will provide two options to check the exit signs. 

(a) One option will be to check the manufacture date on the sign. In some cases this 

manufacture date will not be visible without the temporary removal of the sign. 

(b) The second option will be the use of a comparator tool to determine if the sign 

brightness is still above the minimum required value. 

E. Compliance 

(1) Recommended 

Fokker Services recommends the accomplishment of this Service Bulletin within 6 

months after the issue date 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. 

F. Approval 

(1) The technical content of this document is approved by EASA or under the authority of 

DOA nr. EASA.21J.059. 

G. Manpower 

(1) Approximately 1 man-hour is 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 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 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. 

Jul 05/10 SBF50-33-038 

Page 3 

(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"). 

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) document 

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 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. 

SBF50-33-038 Jul 05/10 

Page 4 

(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 

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, no actions are required. 

(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) 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. 

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 this 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 combination with the 

 national language) may be dependant on local regulations. 

** 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 thru 20176, 20178 

 thru 20180, 20182 thru 20199, 20202, 20204 thru 20207, 20210, 20211, 

 20213 thru 20252, 20254 thru 20266, 20270 thru 20279, 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 Service 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 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. 

SBF50-33-038 Jul 05/10 

Page 6 

(2) You can contact your Fokker Services Account Support 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 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. 

Jul 05/10 SBF50-33-038 

Page 7 

3. Accomplishment Instructions 

General: 

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

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

THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFETY 

INSTRUCTIONS. 

Refer to IPC figure 33-52-03-02, or 33-52-03-08 (20287 only) 

A. Inspect the Exit signs on the partition wall. 

(1) Inspect by checking the manufacturing date of the 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. Remove: 

- 1 exit sign pn AC30-xxxC3 or AC30x. 

(b) Thoroughly clean the partition wall to remove all remaining glue. Use: 

- AR solvent pn MEK (Fk11-003). 

(c) Check the manufacture date of the exit sign. Continue 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 tool against the illuminated area of 

the self-illuminated exit signs on the partition wall. Use: 

- 1 comparator tool pn DB-45-B3 (250 micro-lamberts)

(c) Visually check the illumination of the exit signs with the calibrated light source in 

the comparator tool. 

(d) Verify if the exit sign is brighter or weaker than the calibrated light source of the 

comparator tool. 

(e) If necessary, return lighting in the cabin to the 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 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. 

SBF50-33-038 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 the comparator tool. 

(a) If removed in step A.(2), re-install the sign on 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 equivalent, 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 the sign from the partition wall. 

Remove: 

- 1 exit sign pn AC30-xxxC3 or AC30x (discard). 

(b) Thoroughly clean the partition wall to remove all 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 present on the back of 

 the sign. 

NOTE: * Determine the correct language (combination) based 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 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. 

Jul 05/10 SBF50-33-038 

Page 9 

(d) Discard the old exit sign. 

1 The Exit signs contain Tritium (H3), a weak radioactive source. Discard the 

signs in accordance with local regulations, or contact the vendor, Self 

Powered Lighting, in case no local nuclear waste disposal 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 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. 

SBF50-33-038 Jul 05/10 

Page 10 

Comparator Tool pn DB-45-B3 (250 μL). 

Figure 1