## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 1 Planning Information

A. Effectivity

(1) F28 Mark 0100 aircraft serial numbers: 11244 thru 11441.

B. Concurrent Requirements

(1) Not applicable.

C. Reason

(1) Service experience revealed that the power switch of the Fueling Control Panel (FCP) appeared to be “ON” with the access panel closed. The cam on the access panel that should operate the power switch if this is forgotten by the operating personnel can pivot away during closing of the panel. This may result in the switch staying in the “ON” position. Service Bulletin SBF100-28-039 introduces an improved cam that is more reliable.

Page 1 2 3 4 5 6 7 8 9 10 11

Revision - - - - - - - - - - - This Service Bulletin supersedes Service Bulletin SBF100-28-039

FUEL

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

Fueling Control Panel - Check for the Presence of, and if necessary the installation of, an Modified Cam for Automatic Off-Switching of Power Switch on the Fueling Control Panel.

## Service Bulletin Fokker 70/100

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.

SBF100-28-063 Apr 15/10 Page 2 (2) The design review of the F28 MK 0100 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 in the wing tanks when electrical power for refueling is not switched off after refueling. Under certain conditions this may result in an ignition source in the wing tank vapour space.

(3) To remove this potentially unsafe condition, it must be ensured that the new cam pn D48127-009 is still installed on all aircraft and functions correctly.

(4) This Service Bulletin is only applicable for aircraft equipped with Center Wing Bag Tank (CWBT).

D. Description

(1) This Service Bulletin consist out of two parts:

- Part 1 of this Service Bulletin tells you to check, if the cam pn D48127-009 is (still) installed and operates correctly

- Part 2 of this Service Bulletin tells you how to install the cam pn D48127-009 and check that it operates correctly.

E. Compliance

(1) Recommended.

Part 1 : Fokker Services recommends the accomplishment of this Service Bulletin within 6 months after the date of issue of this Service Bulletin.

Part 2 Fokker Services recommends the accomplishment of this Service Bulletin within 2 years after the date of 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.

F. Approval

(1) The technical content of this document is approved by EASA or under the authority of DOA nr. EASA.21J.059.

## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 3 G. Manpower

(1) Approximately 0,5 man-hour is necessary to do Part 1 .of this Service Bulletin on one aircraft.

This table of manpower will help you to schedule and do part 1 of this Service Bulletin:

Instructions Men Man-hours Elapsed time (hours) Removal - - - Modification Inspection 1 0,5 0,5

Installation - - - Testing - - - Total 0,5 0,5

(2) Approximately 2,5 man-hours are necessary to do Part 2 .of this Service Bulletin on one aircraft.

This table of manpower will help you to schedule and do part 2 of this Service Bulletin:

Instructions Men Man-hours Elapsed time (hours) Removal 1 0,5 0,5 Modification Inspection 2 1,0 0,5
Installation 1 0,5 0,5 Testing 1 0,5 0,5 Total 2,5 2,0

NOTE : This estimate does not include the time necessary for the paint to dry and/or the sealant to cure.

(3) The estimated hours are for direct labor done by experienced personnel. They are calculated based on the conditions given in SBF100-00-001 (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.

## Service Bulletin Fokker 70/100

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.

SBF100-28-063 Apr 15/10 Page 4 J. Software Accomplishment Instructions

(1) Not applicable.

K. References

(1) Fokker 70/100 Aircraft Maintenance Manual (AMM) Fokker 70/100 Structural Repair Manual (SRM) Fokker Consumable Material List (CML) Fokker 70/100 Service Experience Digest (SED), subject 28-21/003 Fokker internal reference(s): - ECR 92303 - EMI 90053.

L. Publications Affected

(1) This SB affects the publications listed below:

(a) Maintenance Documentation

- Fokker 70/100 Illustrated Parts Catalog (IPC) - chapter 28-21-01. Fokker 70/100 Aircraft Maintenance Manual (AMM) - chapter 28-21-01
NOTE: See attached Manual Change Notification MCNM F100-139.

(b) Maintenance Programs

- Fokker 70/100 Maintenance Review Board (MRB)

(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, the Fuel ALI and CDCCL items as specified below shall be followed.

Fuel ALI : It shall be assured that cam pn D48127-009 at the Fueling Control Panel (FCP) access door, is installed and functions properly. The function is that the power switch of the FCP is switched OFF by closing the access door.

## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 5 The check interval is 1200 FH and the first repeat check must be performed: - if only part 1 is applicable: not later than 1200 FH after the check for correct functioning of the cam in part 1 was performed or - if part 1 and part 2 are applicable not later than 1200 FH after the check for correct functioning of the cam in part 2 was performed The check must be performed in accordance with the instruction s in the new task 28-21-00-710-825A introduced with the attached MCNM-F100-139.
CDCCL: In case of replacement or removal / installation of Fueling Control Panel (FCP) access door, cam or FCP it shall be verified after (re)installation that a cam with partnumber D48127-009 is installed and functions correctly. The verification shall be performed in accordance with the instructions in the new subtask 28-21-01-210-034-A00 introduced with the attached MCNM-F100-139.

(d) Operational Documentation

Not affected.

(2) For incorporation of this Service Bulletin in your documentation refer to SBF100-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service Bulletins in Documentation of Fokker Services").

NOTE : Accomplishment of this Service Bulletin is only complete with incorporation of the manual changes, per the ref MCNM, Temporary Revision or general revision.

M. Interchangeability or Intermixability of Parts

(1) Not applicable.

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/ Disposition

NAS1097AD3 4 Rivet - - Local source

(2) These mod kit parts are necessary to do this Service Bulletin on 1 aircraft.

## Service Bulletin Fokker 70/100

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.

SBF100-28-063 Apr 15/10 Page 6

New Part Number Qty Keyword Info Old Part Number Instructions/ Disposition

AN960KD6L 2 Washer - - - D48127-009 1 Cam - A42509-089 discard 1 Bracket - A45950-007 discard MS21073L06 2 Nut - - - NAS601-7P 2 Screw - - -

C. Tooling – Price and Availability

(1) Not applicable.

D. Drawings Required

(1) Not applicable.

## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 7 3. Accomplishment Instructions

General:



### - For finish codes references, refer to “Myfokkerfleet.com/Documentation/FC”.

- For CML material number references, refer to “Myfokkerfleet.com/Documentation/CML”. - For the removal/installation of solid rivets, refer to the SRM, chapter 51-40-02. - For the application of Primer and Paint, refer to the AMM, chapter 51-21-00. - For drilling and countersinking procedures, refer to the SRM, chapter 51-22-01.

WARNING : BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFETY INSTRUCTIONS.

Part 1 : Inspection for the presence and correct functioning of cam p/n D48127-009.

A. Gain access to area zone 178. Open panel 178BR.

Refer to figure 2 section A-A.

B. Check the presence of modified cam pn D48127-009. To identify that Cam pn D48127-009 is installed, check that cam is mounted with screws positioned at the front side of the cam. If cam pn D48127-009 is not present then perform part 2 of this Service Bulletin. If cam pn D48127-009 is present proceed with step C.

C. Check correct functioning of the cam, reference is made to step G of Part 2.

Part 2 : Installation of cam pn D48127-009.

A. Gain access to area zone 178. Open panel 178BR.

B. Remove the existing cam from panel 178BR as follows:
Refer to figure 1

(1) Remove and discard the following parts:

- 1 cam pn A42509-089 - 1 bracket pn A45950-007 - 1 screw pn NAS601-6P - 1 screw pn NAS601-10P - 2 washers pn AN960-KD6L - 2 nuts pn MS21042L06.

(2) Remove and re-install the following parts:

- 2 bolts pn NAS1518A3T04 - 2 nuts pn MS21042L3 - 2 washers pn NAS1252-10L.

## Service Bulletin Fokker 70/100

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.

SBF100-28-063 Apr 15/10 Page 8 C. Install the modified cam on panel 178BR as follows:

Refer to figure 2 and 3

(1) Temporarily install the new cam pn D48127-009 as is shown on Section A-A on figure 2 and Section B-B on figure 3. The center line of the power switch must be in line with the center line of the new cam.

(2) Drill two holes with dia. 4,1 mm H13 at the locations as is shown in figure 3, Section B-B.

(3) Remove the cam.

(4) Temporarily install two anchor nuts pn MS21073L06 and copy drill the attachment holes into panel 178BR for the installation of rivets NAS1097AD3.

(5) Remove the temporarily installed anchor nuts.

(6) De-burr the holes and countersink the rivet holes for the installation of NAS1097AD3 rivets.

D. Install the following parts: - 2 anchor nuts pn MS21073L06 - 4 rivets pn NAS1097AD3.

E. Install the following parts with the cam in the most up position: - 1 cam pn D48127-009 - 2 screws pn NAS601-7P - 2 washers pn AN960KD6L.

F. Adjust the cam as follows:

(1) Carefully close the hatch 178BR. Assure yourself that the cam does not touch the switch guard when the power switch is in the “OFF” position.

(2) If the cam touches the power switch guard, re-adjust the cam by lowering it until no contact is accomplished. Refer to figure 2 for the required situation.

G. Check the function of the cam as follows:

(1) Put the power switch of the fueling control panel in the “ON” – position.

(2) Close and latch the panel 178BR.

(3) Open the panel.

(4) Check that the power switch is in the “OFF” - position.

(5) If the power switch is not in the “OFF “-position, re-adjust the cam as described in step F.

## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 9

## Service Bulletin Fokker 70/100

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.

SBF100-28-063 Apr 15/10 Page 10

## Service Bulletin Fokker 70/100

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.

Apr 15/10 SBF100-28-063 Page 11

## Manual Change Notification – Maintenance Documentation Fokker 70/100

APR 15/10 MCNM F100-139 Page 1 of 4 

### MCNM-F100-139

Subject : Fuel – Presence of a modified Cam for Automatic Off-Switching of the Power Switch on the Fueling Control Panel

Reason : This MCN is issued to provide you with the changes on the content(s) of the affected manual(s), due to the introduction of SBF100-28-063.

Effectivity : Refer to SBF100-28-063.

Compliance : Once you have determined the applicability of this MCN for one or more of your aircraft, incorporate this information into the applicable manual(s).

Publications affected : The Aircraft Maintenance Manual (AMM) The Illustrated Parts Catalogue (IPC).

Change Note : AMM

Update Task 28-21-01-400-814A, as follows:

- Put the text (CDCCL) in front of the title of the task

- Put the following Note below the title of the task:

- At the end of the Task, add a new Figure 28-21-01-990-034-A00 as shown on Page 4 of this MCN.

- Add a new Subtask 28-21-01-210-034-A00 after Subtask 28-21-01-860-034-A00, with the following text:

## Manual Change Notification – Maintenance Documentation Fokker 70/100

APR 15/10 MCNM F100-139 Page 2 of 4 Add a new Task 28-21-00-710-825A that contains the following procedure:

Operational Check of the Automatic Off-Switching of the Power Switch on the Fueling Control Panel

This maintenance procedure affects Fuel Tank Safety. It is related to a fuel system ALI (Airworthiness Limitation Item). Strictly adhere to the contents of this task to make sure that unsafe conditions do not develop.

(A) Open the access-door 178BR. (B) Make sure that the installation of the power off-switching cam on the access-door 178BR is clean, correctly attached and not damaged.

NOTE: Start of Fuel System ALI critical section.

(C) Make sure that the cam partnumber D48127-009 (Post SBF100-28-063) is installed (Ref. Fig. 28-21-00-990-015-A00) (See Figure 2 on Page 4 of this MCN). (D) Do the operational check

NOTE: If necessary, you must adjust the cam on the access-door. During the adjustment, you must make sure that the cam does not touch the guard when the POWER switch is in the OFF position and the access-door is closed.

(1) On the fueling control panel, lift the guard and set the POWER switch to ON. (2) Close the access-door 178BR, and open it again. (3) Make sure that the POWER switch on the fueling control panel is in the OFF position and the guard is closed.

NOTE: End of Fuel System ALI critical section.

(E) Close the access-door 178BR.

IPC

If IPC Figure 28-21-01-01 in your manual contains the partnumbers of the cam installation that must be removed and discarded in SBF100-28-063, then update as follows:

- Replace the illustration in your manual, by Figure 1 as shown on Page 3 of this MCN

- Update the partslist in your manual, to show the new partnumbers of the modified cam installation as given in SBF100-28-063.

Note: If you have a Document Revision Servic e (DRS) with Fokker Services, this MCNM will be included into your manuals, at the earliest opportunity.

## Manual Change Notification – Maintenance Documentation Fokker 70/100

APR 15/10 MCNM F100-139 Page 3 of 4 Fueling Control Panel (IPC 28-21-01-01) Figure 1

## Manual Change Notification – Maintenance Documentation Fokker 70/100

APR 15/10 MCNM F100-139 Page 4 of 4 Power Off-Switching Cam (AMM 28-21-00-990-015-A00/28-21-01-990-034-A00) Figure 2