Subject Reason Reason forRevision Effectivity Compliance Publications affected

**~'** Change Note I JAN 09/14

Manual Change Notification - Maintenance Documentation Fokker28 MCNM-F28-034 REV 1 Fuel - Introduction of Fuses inthe Wiring of the Level Control Pilot Valve . This MCN is issued to provide you with the changes on the content(s) of the affected manual(s) ,due to the introduction of SBF28-28-051 . With Revision 1of SBF28-28-051 ,the CDCCL description in this Service Bulletin has been replaced bya reference to the applicable CDCCL items as specified in SBF28-28-050 . However ,the CDCCL descriptions of these referenced CDCCL items have been revised as well. Asa result of this,the Change Notes given in this MCNM have been revised accordingly . Refer to SBF28-28-051. Once you have determined the applicability of this MCN for one or more of your aircraft , incorporate this information into the applicable manual(s) . The Maintenance Manual (MM) The Wiring Diagram Manual (WDM) . NOTE : Make sure that your manual contains the contents of MCNM F28-023 , before you incorporate this MCNM . If your manual contains Temporary Revision No. 28-49 in front of chapter 28-21- 03 pageblock 401,then do as follows : -In3. Removal/Installation ,add the following step between the steps 8.(13) and 8.(14), and re-identify the existing steps 8.(14) thru 8(23) accordingly : NOTE: Start of Fuel System CDCCL affected section .

(14) Doa check of the fuse assembly NOTE: The installation of the fuse assembly is identified with a yellow sleeve at each end. (a) Find the installation of the fuse assembly QC98-831 or 2098-841 between the electrical-wires (Refer to the Wiring Diagram Manual28-21- 02 for more data) . (b) Make sure that the installation of the fuse assembly isin good condition and not damaged . MCNM F28-034 REV 1 Page 1of4I JAN 09/14

Manual Change Notification - Maintenance Documentation Fokker28 (c) Ifthe inspection is not satisfactory ,then do these steps : 1 This part is subject toa CDCCL. Make sure that the partnumber of the fuse assembly that you must install ,isa CDCCL-approved partnumber ( Refer to the Wiring Di agram Manual28 -21- 02 for the approved partnumber(s)). £ Replace the fuse assembly/assemblies . NOTE : End of Fuel System CDCCL affected section . If your manual contains Temporary Revision No. 28-30, or your manual contains 28-21-03 pageblock 401 only,then do as follows : -In1. General ,add the following paragraph : This maintenance procedure affects Fuel Tank Safety. The procedure is related toa fuel system CDCCL (Critical Design Configuration Control Limitation Item). Strictly adhere to the contents of the CDCCL affected sections to ensure that unsafe conditions do not develop. -In3. Removal/Installation ,add the following step between the steps 8.(11) and 8.(12),and re-identify the existing steps 8.(12) thru 8(20) accordingly : NOTE : Start of Fuel System CDCCL affected section .

(12) Doa check of the fuse assembly NOTE : The installation of the fuse assembly is identified with a yellow sleeve at each end. (a) Find the installation of the fuse assembly QC98-831 or 2098-841 between the electrical-wires (Refer to the Wiring Diagram Manual28-21- 02 for more data). (b) Make sure that the installation of the fuse assembly isin good condition and not damaged. (c) Ifthe inspection is not satisfactory, then do these steps : 1 This part is subject toa CDCCL. Make sure that the partnumber of the fuse assembly that you must install, isa CDCCL-approved partnumber (Refer to the Wiring Diagram Manual28-21-02 for the approved partnumber(s)) . £ Replace the fuse assembly/assemblies . NOTE: End of Fuel System CDCCL affected section .MCNM F28-034 REV 1 Page 2 of4I JAN 09/14

Manual Change Notification - Maintenance Documentation Fokker 28 If your manual contains Temporary Revision No. 28-58 in front of chapter 28-21- 03 pageblock 401, then update step 8.(14) as follows: NOTE: Start of Fuel System CDCCL affected section. Doa check of the fuse assembly NOTE: The installation of the fuse assembly is identified with a yellow sleeve at each end. (a) Find the installation of the fuse assembly QC98-831 or 2098-841 between the electrical-wires (Refer to the Wiring Diagram Manual 28-21- 02 for more data) . (b) Make sure that the installation of the fuse assembly isin good condition and not damaged . (c) Ifthe inspection is not satisfactory, then do these steps : 1 This part is subject toaCD CCL. Make sure that the partnumber of the fuse assembly that you must install, isa CDCCL-approved partnumber (Refer to the Wiring Diagram Manual 28-21-02 for the approved partnumber(s)). 2. Replace the fuse assembly/assemblies . NOTE : End of Fuel System CDCCL affected section. If your manual contains Temporary Revision No. 28-57 after 28-21-03 pageblock 401, then remove and discard this document from your manual. In 28-21-00 pageblock 001 (all codes) ,add the following paragraph to 2.8. Electrical System ,orif your manual contains Temporary Revision No. 28-59 , then update the following paragraph as follows: There are fuse assemblies installed in the electrical-wiring of the level-control pilot-valves, between the wing rear-spar and the main tank, in zone 830 and 840.The fuses prevent that a short-circuit inthe electrical-installation ofa level-control pilot valve can result inan ignition-source in the fuel tank. MCNM F28-034 REV 1 Page 3 of4Manual Change Notification - Maintenance Documentation Fokker28 Update Chapter 28-21-02, in accordance with the drawings as given in SBF28-

28-051 , paragraph 2.0.. On the updated wiring diagram ,add the text" (CDCCL )" next to each partnumber W48006-401 . NOTE: Ifyou have a Continued Airworthiness Documentation Service with Fokker Services, this MCN will be included into your manuals, at the earliest opportunity . NOTE : MCNM-F28-034 Revision 1 supersedes MCNM-F28-034 dated JUN 23/10. Text highlighted bya revision bar indicates : A revision of the text introduced with the original issue of this MCNM . An introduction of new changes. Text not highlighted bya revision bar was already included inthe original issue of this MCNM ,and isnot revised. Itis retained for clarity . I JAN 09/14 MCNM F28-034 REV 1 Page 4 of4