Subject 

Reason 

Reason for 

Revision 

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 in the 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 1 of SBF28-28-051 , the CDCCL description in this Service 

Bulletin has been replaced by a reference to the applicable CDCCL items as 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. As a 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: 

- In 3. 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) Do a 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 is in good condition 

and not damaged. 

MCNM F28-034 REV 1 

Page 1 of 4 
I JAN 09/14 

Manual Change Notification - Maintenance Documentation 

Fokker28 

(c) If the inspection is not satisfactory, then do these steps: 

1 This part is subject to a CDCCL. Make sure that the partnumber of the 

fuse assembly that you must install, is a 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. 

If your manual contains Temporary Revision No. 28-30, or your manual contains 

28-21-03 pageblock 401 only, then do as follows: 

- In 1. General, add the following paragraph: 

This maintenance procedure affects Fuel Tank Safety. The procedure is related to a 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. 

- In 3. 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) Do a 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 is in good condition 

and not damaged. 

(c) If the inspection is not satisfactory, then do these steps: 

1 This part is subject to a CDCCL. Make sure that the partnumber of the 

fuse assembly that you must install, is a 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 of4 
I 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. 

Do a 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 is in good condition 

and not damaged. 

(c) If the inspection is not satisfactory, then do these steps: 

1 This part is subject to a CD CCL. Make sure that the partnumber of the 

fuse assembly that you must install, is a 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, or if 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 in the electrical-installation of a 

level-control pilot valve can result in an ignition-source in the fuel tank. 

MCNM F28-034 REV 1 

Page 3 of4 
Manual 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: If you 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 by a revision bar indicates: 

A revision of the text introduced with the original issue of this MCNM. 

An introduction of new changes. 

Text not highlighted by a revision bar was already included in the original issue of this 

MCNM, and is not revised. It is retained for clarity. 

I JAN 09/14 MCNM F28-034 REV 1 

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