## Service Bulletin Fokker Services B.V.

Prepared Function / Note Date bemelman-pb01821 Feb 09/15 Colleague Check benthem-eb01865 Feb 13/15 Manager Final Approval aroon.siriphant Apr 22/15 Office of Airworthiness Approval visser-hv01800 Apr 22/15

Status: Released Revision:

- Released date: ( Mmm dd/yy ) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095

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
SBF100-27-095
Revision -

FLIGHT CONTROLS - ELEVATOR MECHANICAL CONTROL

One-time inspection of the elev ator tension control regulator

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12



## 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 Quality Reporting Form and attachments (if applicable):

• 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 

### FLIGHT CONTROLS Elevator Mechanical Control - A One-time Inspection of the Elevator Tension Control Regulator

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12



## 2. Planning Information A. Effectivity (1) F28 Mark 0070/0100 aircraft serial number(s):
All B. Concurrent Requirements (1) Not applicable.
C. Reason (1) Recently during the accomplishment of the taxi-out checklist ("before take-off check" as per AOM) on a Fokker 70 the flight crew noticed that the elevator movement was (partly) obstructed. (2) The subsequent investigation by the operator revealed that the flight control lock adjuster bracket was loose from the elevator tension control regulator. Rotation of the flight control lock adjuster bracket caused the blockage of the elevator mechanism. Two out of three attachment bolts were found broken and two nuts were missing. (3) The operator decided to perform a one-time inspection of their complete fleet. No further discrepancies (loose bolts, missing nut(s) or loose brackets) were identified. (4) The detailed investigation of the failed parts indicated that the two missing nuts are to be considered the main contributor to the occurrence. However, no root cause could be identified for the absence of these two parts. In order to safeguard the fleet on the short to medium term it has been decided to issue a one-time inspection Service Bulletin. D. Description (1) This Service Bulletin tells you how to: - Perform a one-time inspection of the elevator tension control regulator.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### E. Compliance (1) Recommended Fokker Services recommends the accomplishment of the Service Bulletin at the next scheduled maintenance opportunity when panel 346AB or panel 346BL is opened for the performance of a scheduled MRB task but not later than 5000 FH from date of issue of this Service Bulletin. See NOTE 2 for details of the relevant scheduled maintenance task numbers. 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.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### NOTE 2:
MRB/MPD Scheduled maintenance tasks which require opening of panel 346AB or panel 346BL
Tasknumber Interval
062308-00-01 5000 FH
202308-00-01 15000 FH
221100-00-02 5000 FH
221100-00-03 10000 FH
221100-00-04 5000 FH
221100-00-07 12000 FH
273100-00-01 5000 FH
273100-00-03 5000 FH
277100-00-01 15000 FH
277100-00-03 5000 FH
277100-00-07 5000 FH
550000-00-01 12 Year


### MPD Optional maintenance task which requires opening of panel 346AB
Tasknumber Interval
221100-50-01 250 FH

F. Approval (1) The technical content of this document is approved under the authority of DOA ref. EASA.21J.059.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### G. Manpower (1) Approximately 0.5 man-hours are necessa ry to do this Service Bulletin on one aircraft. This table of manpower will help you to schedule and do this Service Bulletin:

NOTE : This estimate does not include the time necessary to get access to the bullet fairing and for corrective action if so required. (2) 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) Direct Current (DC) Loads: (a) Not changed. (2) Alternating Current (AC) Loads: (a) Not changed. J. Software Accomplishment Summary (1) Not applicable. Elapsed time (hours) Removal 1 0.2 0.2 Modification Inspection Installation 1 0.2 0.2 Testing - -

- Total 0.5 0.5 0.1 Instructions Men Man-hours

1 0.1

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### K. References (1) Fokker 70/100 Aircraft Maintenance Manual (AMM) Fokker 70/100 Aircraft Operating Manual (AOM) Fokker 70/100 Illustrated Parts Catalog (IPC) Fokker 70/100 Maintenance Review Board Document (MRB) Fokker 70/100 Maintenance Planning Document (MPD) Fokker Consumable Material List (CML) Fokker Standards & Process Manual (SPM)
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. (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.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### (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) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12



## 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) Not applicable.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12



## 4. Accomplishment Instructions
General:

- For CML material number references refer to “MyFokkerFleet.com > Documentation and

select CML” and/or AMM chapter 20-30-00.

- For Standards and Process Manual (SPM) refe rences refer to “MyFokkerFleet.com >

Documentation and select SPM”.

- Use standard application and inspection of torque values acc to AMM chapter 20-12-00

and/or TH6.3202. WARNING : BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. OBEY THE INSTRUCTIONS AND MANUFACTURER'S HEALTH AND SAFETY INSTRUCTIONS. A. Put the support equipment in position B. Put these Warning Signs: - "DO NOT OPERATE THE FLIGHT CONTROLS" in the flight-compartment. - "KEEP CLEAR OF THE FLIGHT CONTROLS" below the rear fuselage. - "DO NOT PRESSURIZE THE HYDRAULIC SYSTEM" in the flight compartment, and at the hydraulic ground-servicing panel. C. Put the rear fuselage support (tool No. MS01 or equivalent) in position. D. On the pedestal, set the FLIGHT CONTROL LOCK lever to the OFF (unlocked) position. E. Open, tag, and safety the circuit breaker(s):
- HYDR SYS 1 ELEC DRIVEN PUMP - HYDR SYS 2 ELEC DRIVEN PUMP F. Open access panel 346AB or 346BL, refer to AMM TASK 06-30-03-ZZ1-810-A – General – Access Panels. Refer to figure 1. G. Check the flight control lock adjuster bracket ref. item 50 for correct installation as follows: (1) Confirm that there is no relative movement between bracket item 50 and the pulley to which it is attached. If relative movement is found, continue with step H. (2) Visually check the correct installation of the 3 bolts and nuts by detailed inspection of the sealing on the bolt heads and nuts for signs of damage caused by loose bolts/nuts and/or rotation of the bolts/nuts.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 

### (3) If all 3 bolts (i.e. 1 ea item 90 and 2 ea item 60) and all 3 nuts (i.e. 1 ea item 110 and 2 ea item 80) are present and no damage of the sealing is found, continue with step I. (4) If bolts/nuts are loose, broken or missing continue with step H.
H. Corrective action (1) If a part is loose or only the sealing is damaged, remove sealing from the bolt heads and nuts and torque as required. - Apply sealant ref. CML no. Fk09-016 i.a.w. TH6.6548. - Apply a skydrol resistant topcoat ref. CML no. Fk09-008 i.a.w. TH6.6556.(2) If a part is broken or missing, refer to IPC chapter 27-31-03 / REGULATOR INSTLELEVATOR figure 1 for identification of the required parts. (3) Install the replacement parts (if required) and wet assemble using sealant ref. CML no. Fk09-016 i.a.w. TH6.6548. - Apply sealant ref. CML no. Fk09-016 i.a.w. TH6.6548. - Apply a skydrol resistant topcoat ref. CML no. Fk09-008 i.a.w. TH6.6556. (4) In case the flight control lock adjuster bracket installation cannot be corrected in situ, then replace the complete elevator tension control regulator by a serviceable one i.a.w. AMM task 27-31-03-000/400-814-A (Remove/Install the Elevator Cable Tension Regulator).

I. Close these circuit breakers:
- HYDR SYS 1 ELEC DRIVEN PUMP - HYDR SYS 2 ELEC DRIVEN PUMP J. On the pedestal, set the FLIGHT CONTROL LOCK lever to the ON (locked) position. K. Remove all tools, materials and equipment from the work area. Make sure that the area is clean. L. Close access panel 346AB or 346BL ref. AMM task 06-30-03-ZZ1-810-A – General – Access Panels, which was opened in step F. M. Remove the warning signs and the support equipment. N. Report any discrepancies to Fokker Services.

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 Figure 1 – Elevator Tension Control Regulator Assembly

## Service Bulletin Fokker Services B.V.

Status: Released Revision:

- Released date: (Mmm dd/yy) Apr 22/15 Security class: RESTRICTED F100/70 Generic SB no.: SBF100-27-095
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 12 of 12



### SB Title: One-time inspection of the elevator tension control regulator Use this Service Bulletin Quality Reporting 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. Engineering, Quality Department P.O. Box 1357 2130 EL Hoofddorp The Netherlands Fax: +31 (0) 88 6280111 or E-mail: technicalservices@fokker.com