## Service Bulletin Fokker Services B.V.

Prepared Function / Note Date jeffrey.keetlaer Jan 20/14 General Check aroon.siriphant S/TFSE Jan 20/14 Manager Final Approval aroon.siriphant S/TFSE Jan 22/14 Office of Airworthiness Approval visser-hv01800 S/TW Jan 23/14

Status: Released Revision:

- Released date: ( Mmm dd/yy ) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. EASA approved procedure for electronic sign-off 

## F100/70 Generic SB

SBF100-53-124

Revision -

FUSELAGE - TAIL SECTION

A One-Time Inspection of Oblique Frame 67-2

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 1 of 11



## 1. General Information

A. General

B. Table of Contents

• Section 1: General Information

• Section 2: Planning Information

• Section 3: Material Information

• Section 4: Accomplishment Instructions

• Service Bulletin Reporting Quality Form and if applicable attachments:

• List of drawings/parts lists

• Parts List Local source (PLL)

• Parts List Supply (PLS)

• Required drawings
C. Service Bulletin Revision History

Revision Date (Mmm dd/yy) Reason for Revision
- Refer to footer First Release FUSELAGE

Tail Section - A One-Time Inspection of Oblique Frame 67-2

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 2 of 11



## 2. Planning Information

A. Effectivity
(1) F28 Mark 0070/0100 aircraft serial number(s): 11244 thru 11585.

NOTE 1 : Aircraft 11300 is already compliant with this one-time inspection Service Bulletin.

NOTE 2 : Aircraft 11310 has (on the LH and RH side of Oblique Frame 67-2) an existing repair per CAS-01726-E1D1O4, which however does not comply with the repair requirements of SBF100-53-125. Contact Fokker Services BV before further flight for special inspection and repair instructions.
B. Concurrent Requirements
(1) Not applicable.

C. Reason
(1) Service experience has shown that cracks can occur in the primary structure of the aircraft at Oblique Frame 67-2 (p/n D37208-001 and/or p/n D37208-002) in the tail section. A one-time inspection is required to investigate if cracks have occurred on Oblique Frame 67-2. At a later stage a repetitive inspection will be included in the Airworthiness Limitations Section (ALS), report SE-623, of the Instructions for Continued Airworthiness.
(2) If cracks are found during the accomplishment of this Service Bulletin a repair has to be accomplished before further flight. Repair procedures are provided in Service Bulletin SBF100-53-125.
D. Description
(1) This Service Bulletin tells you how to:
- Gain access to the tail section and Oblique Frame 67-2 - Inspect the Oblique Frame 67-2 for cracks on both sides - Repair as applicable through reference to SBF100-53-125 - Close up the work area.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 3 of 11 E. Compliance
(1) Recommended
Fokker Services recommends the accomplishment of this Service Bulletin only for aircraft with more than 29.000 Flight Cycles (FC) at the issue date of this Service Bulletin as follows: within 500 (FC) or within one year after the date of issue of this Service Bulletin (whichever comes first).

NOTE 1 : 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.

NOTE 2 : A repeat inspection will be incorporated in the ALS for both repaired and unrepaired (undamaged) configuration.
F. Approval
(1) The technical content of this document is approved under the authority of DOA ref. EASA.21J.059.
G. Manpower
(1) Approximately 1 man-hour is necessary to do this Service Bulletin on one aircraft.
(2) This table of manpower will help you to schedule and do this Service Bulletin:


### Elapsed time (hours) Removal - - - Modification Inspection Installation - - - Testing - - - Total 1.0 1.0 1.0 Instructions Men Man-hours

1 1.0

(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.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 4 of 11 I. Electrical Load Data
(1) Direct Current (DC) Loads:
(a) Not changed.
J. Software Accomplishment Summary
(1) Not applicable.

K. References
(1) Fokker 70/100 Aircraft Maintenance Manual (AMM) Fokker 100 Service Bulletin (SB):

- SBF100-53-125 Fokker internal reference(s): - ECR 016054 - ECR 016055 - CAS-01726-E1D1O4.

L. Publications Affected
(1) This Service Bulletin affects the publications listed below:
(a) Maintenance Documentation

Not affected.
(b) Maintenance Programs

Not affected.
(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 - Fokker 70/100 Airworthiness Limitations Section (ALS):

• Fuel Tank Safety (FTS) - X

• Damage Tolerance of Fatigue Critical Structure (FCS) - X

• Certification Maintenance Requirements (CMR) - X

NOTE : If “YES”, when not already incorporated, the changed ICA will be incorporated in the MRB, the Airworthiness Limitations Section (ALS) and/or the AMM document(s) within one calendar year from the date of issue of this Service Bulletin. Until then, no actions are required.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 5 of 11 (d) Operational Documentation

Not affected.
(2) Report to Fokker Services that this Service Bulletin has been carried out on the applicable aircraft.
(3) You have the possibility to send your SB feedback to Fokker Services per “Service Bulletin Reporting Quality Form”. This form is located on the last Service Bulletin page. (4) 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”).
M. Interchangeability or Intermixability of Parts
(1) Not applicable.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 6 of 11



## 3. Material Information

A. Material – Price and Availability
(1) Not applicable.
B. Material Required
(1) Not applicable.
C. Tooling – Price and Availability
(1) Not applicable.
D. Tooling Required
(1) The special tool(s), which are necessary to complete this Service Bulletin on 1 aircraft and are not part of the mod kit are described in table below.

Part Number Qty Description 28-0-1219G 1 Speed brake ground-lock bar.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 7 of 11



## 4. Accomplishment Instructions

A. Clear the area around the speedbrakes.

Refer to Aircraft Maintenance Manual
B. Open and secure the speedbrakes in accordance with AMM Task 53-40-00-210-856-A.
C. Put an access platform under the open speedbrakes and secure the speedbrakes
(1) Install the Speed Brake ground-lock bar tool pn 28-0-1219G.
D. If necessary, clean the inspection area and the items to be inspected. Do not remove any lubricants or surface protection.
Refer to figures 1, 2 and 3
E. Perform a Detailed Inspection on Oblique Frame 67-2.
(1) Pay attention to the areas shown in figure 1. Check for cracks or crack initiation in the lower boom and vertical web.
(2) Report all crack findings to Fokker Services BV via TechnicalServices@Fokker.com . Include the aircraft serial number, flight cycles and flight hours in the report. Supply several clear pictures of the crack location and report the crack length. Figures 2 and/or 3 must be used to report your findings.
F. Any crack must be repaired before further flight, refer to SBF100-53-125.
G. Job close-up
(1) Remove all tools, materials and equipment from the work area. Make sure that the area is clean.
(2) Remove the Speed Brake ground-lock bar tool pn 28-0-1219G.
(3) Remove the access platform from the work area.
(4) Close the speedbrakes in accordance with AMM Task 53-40-00-210-856-A.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 8 of 11 Possible crack location on rear face, LH upper section of oblique frame 67-2 Possible crack location on rear face, RH upper section of oblique frame 67-2

Possible crack locations Oblique Frame 67-2 Figure 1

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 9 of 11 Crack identification Oblique Frame 67-2 (LH shown only) Figure 2 A

A

Indicate if the crack is located in the LH or RH oblique frame. Section A

- A D.O.F

a b

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 10 of 11 Crack identification Oblique Frame 67-2 (LH shown) Figure 3 

# a b

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Jan 23/14 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-53-124

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. Page 11 of 11



### SB Title: A One-Time Inspection of Oblique Frame 67-2

Use this Service Bulletin Reporting Quality Form to tell us your perception of the quality of the Service Bulletin. The reported data that you provide to us will be used to analyze areas of difficulties and to take corrective actions to further improve the quality of our Service Bulletins. We thank you for the time you have taken in completing this form.
* Rate the scale of 1 to 4, with 1 the lowest score and 4 the highest score. Chapters * 1 2 3 4

a) Quality rating of this SB (overall) 

## □ □ □ □ b) Quality rating of the Planning Information 

## □ □ □ □ c) Quality rating of the Material Information 

## □ □ □ □ d) Quality rating of the Accomplishment Instructions 

## □ □ □ □ e) Quality rating of the Test Instructions (if applicable) 

## □ □ □ □ f) Quality rating of the Illust rations or Drawings (if applicable) 

## □ □ □ □ g) Timely delivery of the SB 

## □ □ □ □

If you have had difficulties with one of the chapters of this Service Bulletin and/or one of your rating(s) is lower than 3, please give a short description of the issue.

Comments:

Operator: Date:

Name / Title:

Please return this form to: Fokker Services B.V. Technical Services, Quality Department P.O. Box 1357 2130 EL Hoofddorp The Netherlands Fax: +31 (0) 88 6280111 or E-mail: technicalservices@fokker.com