# Service Bulletin Fokker Services B.V.

Prepared Function / Note Date gelder-rg02568 Dec 09/14 Colleague Check
moen-hm02430 Dec 09/14 Manager Final Approval
benthem-eb01865 Dec 10/14 Office of Airworthiness Approval reinier.vanoosten Dec 11/14

Status: Released Revision: 3 Released date: ( Mmm dd/yy ) Dec 11/14 Security class: UNCLASSIFIED F27 Generic SB no.: SBF27-28-070

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 

# F27 Generic SB

SBF27-28-070

Revision 3

FUEL - GENERAL

Introduction of Fuel Airworthiness Limita tion Items (ALI) a nd Critical Design Configuration Control Limi tations (CDCCL) for the F 27 Mk200/300/400/500/600/700

# Service Bulletin Fokker F27

Jun 30/06 SBF27-28-070 Revision 3, Dec 11/14 Page 1

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. 

### 1. Planning Information

A. Effectivity

(1) All F27 Mk200/300/400/500/600/700 aircraft within the serial number range: 10102 thru 10692

NOTE: F27 Mk100 is not affected by the Fuel Tank Safety Program.

(2) Production version of this modification: Not applicable.

B. Concurrent Requirements

(1) Not applicable.

C. Reason (1) In accordance with the requirements of SFAR no. 88 Amendment 21-78 and INT/POL/25/12 Fuel Tank Safety, a safety review has been conducted on the F27 Mk200/300/400/500/600/700 fuel tank system and components that affect fuel tank system safety.

Page 1 2 3 4 5 6 7 8 9 10

Revision 3 3 3 3 3 3 3 3 3 3 FUEL

" This Service Bulletin is associated with the Fuel Tank Safety Program. "

Fuel - Introduction of Fuel Airworthiness Limitation Items (ALI) and Critical Design Configuration Control Limitations (CDCCL) for the F27 Mk200/300/400/500/600/700.

# Service Bulletin Fokker F27

SBF27-28-070 Jun 30/06 Page 2 Revision 3, Dec 11/14

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. 

### Reason for Revision

(2) This revision is made to:

- Update the Fuel Airworthiness Limitation Items (ALI) table.  Task descriptions added to Fuel ALI’s 280000-00-01 and 280000-00-02.

- Update the Critical Design Configuration Control Limitations (CDCCL) table  CDCCL 11.1 and 11.2 added.

- Change the Compliance paragraph.

- Add ECR016135 to the References paragraph.

D. Description

(1) Based on the results of the safety review, this Service Bulletin specifies the Fuel Airworthiness Limitation Items (ALI) and the Critical Design Configuration Control Limitations (CDCCL) required to prevent the development of unsafe conditions within the fuel system. Fuel Airworthiness Limitation Items (ALI): as applied to the Fuel Tank system safety policy, this term means fuel system mandatory maintenance inspections determined necessary to ensure that unsafe conditions do not arise in the fuel system throughout the operational life of the airplane. Critical Design Configuration Control Li mitations (CDCCL): as applied to the Fuel Tank system safety policy, this term refers to a feature of any aircraft system which must be retained during modification, change, repair or scheduled maintenance to ensure that an unsafe condition does not develop in the fuel system. Operators are expected to demonstrate to their Airworthiness Authority Maintenance Inspector that the required configuration control systems are in place to ensure that CDCCL’s are properly identified and managed.

E. Compliance

(1) Recommended.

Fokker Services recommends to incorporate and to adhere to the information in this Service Bulletin in accordance with the compliance terms as specified in the (new or revised) EASA Airworthiness Directive.

NOTE : EASA Airworthiness Directive 2014-0105, has been issued with respect to this subject.

NOTE : It is expected that EASA will issue a (new or revised) Airworthiness Directive (AD) with respect to this subject. Refer to the EASA website for the publication of a Proposed Airworthiness Directive for comments.

# Service Bulletin Fokker F27

Jun 30/06 SBF27-28-070 Revision 3, Dec 11/14 Page 3

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. 

### F. Approval

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

G. Manpower

(1) None.

H. Weight and Balance

(1) Weight change: None Index change: None.

I. Electrical Load Data

(1) Not changed.

J. Software Accomplishment Summary

(1) Not applicable.

K. References

(1) Fokker internal reference(s):

- Fokker Services report TE-0899. - ECR016135

L. Publications Affected

(1) This SB affects the publications listed below:

(a) Maintenance Documentation

- F27 Maintenance Manual (MM). - F27 Illustrated Parts Catalog (IPC).

(b) Maintenance Programs

- F27 Customized Maintenance Program (CMP) - F27 Inspection Guide - F27 Maintenance Data - F27 Maintenance Schedule.

The affected maintenance program change is described in: “3. Accomplishment Instructions”.

# Service Bulletin Fokker F27

SBF27-28-070 Jun 30/06 Page 4 Revision 3, Dec 11/14

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. 

### (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 -

NOTE : If “YES”, the changed ICA is described in the “Accomplishment Instructions” of this SB.

(d) Operational Documentation

Not affected.

(2) You have the possibility to send your SB feedback to Fokker Services per “Reporting Quality Form”. This form is located on the last SB page.

(3) For incorporation of this Service Bulletin in your documentation refer to SBF27-00-001 (Service Bulletin Introduction, section 4 "Incorporation of Service Bulletins in Documentation of Fokker Services").

M. Interchangeability or Intermixability of Parts

(1) Not applicable.

2. 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. Drawings Required

(1) Not applicable.

# Service Bulletin Fokker F27

Jun 30/06 SBF27-28-070 Revision 3, Dec 11/14 Page 5

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. 

### 3. Accomplishment Instructions

A. Fuel Airworthiness Limitation Items

As applied to Fuel Tank system safety policy, this term means fuel system mandatory maintenance inspections determined necessary to ensure that unsafe conditions do not arise in the fuel system throughout the operational life of the airplane.

FUEL AIRWORTHINESS LIMITATION ITEMS
Tasknumber Task Description Interval Effectivity Initial* Repeat* 280000-01 DETAILED INSPECTION OF THE ELECTRICAL BONDING (MAIN TANKS 

### ). A detailed inspection of the electrical bonding provisions of fuel lines, ventilation lines and components inside or connected to the wing main tanks and of the bonding prov isions of the collector tanks shall be carried out to verify all bonding provisions required per design are present, properly installed and in good condition.

Anomalies shall be corrected. 01/01/2013 Note 1 8 YR ALL

280000-02 DETAILED INSPECTION OF THE DRAIN HOLES AND DRAIN PATHS IN THE DRY BAY ZONE. A detailed inspection of the drain holes and drain paths in the dry bay zones adjacent to wing main tanks shall be carried out to verify the following:

o Dry bay is clean

o Drain holes and drain paths are clean and free of

any obstruction

Anomalies shall be corrected. 01/01/2008 2 YR ALL



### * Not later than

Note 1: The initial inspection shall be done not later than January 1, 2013 except for bonding provisions introduced through SBF27-28-071 and SBF27-28-072. For bonding installed with SBF27-28-71 or SBF27-28-072 the initial inspection date is the accomplishment date of that applicable Service Bulletin with which the bonding provisions have been introduced.

# Service Bulletin Fokker F27

SBF27-28-070 Jun 30/06 Page 6 Revision 3, Dec 11/14

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. 

### B. Exceptional short-term extensions

Since Fuel ALI Maintenance/Inspection intervals are generally not determined from calculations in which failure rate data is known with a high level of confidence, an exceptional short-term extension for a specific Fuel ALI interval may be made on one aircraft for a limited period of time without jeopardising safety.

The term 'exceptional short-term extension' is defined as an increase in a Fuel ALI interval that may be needed to cover an uncontrollable or unexpected situation. Repeated use of such extensions, either on the same aircraft or on similar aircraft in the operator's fleet, should not be used as a substitute for good management practices.

Unless noted adjacent to the task, for all Fuel ALI’s identified in this document, it has been accepted by the Primary Certification Office ( EASA) that short-term extensions up to the following maximum values may be granted without consultation with that office. Requests for extensions in excess of these values must be submitted with full justification to the Primary Certification Office (EASA) such that approval, if granted, can be given prior to their use.

- Fuel ALI’s controlled by Flight Hours (FH)

Extensions up to 10% or 500 FH (whichever is the lesser) may exceptionally be granted on Fuel ALI intervals quoted in terms of flight hours.

- Fuel ALI’s controlled by Flight Cycles (FC)

Extensions up to 5% or 250 FC (whichever is the lesser) may exceptionally be granted on Fuel ALI intervals quoted in terms of flight cycles or landings.

- Fuel ALI’s controlled by Calendar Time (MO)

Where the repeat interval is 12 months or less, extensions up to 10% or 1 month (whichever is the lesser) may exceptionally be granted on Fuel ALI intervals quoted in terms of months. Where the repeat interval is greater than 12 m onths but less than 3 years, extensions up to 2 months may exceptionally be granted. Where the repeat interval is 3 years or greater, extensions up to 3 months may exceptionally be granted. It is the operator's responsibility to identify appropriate procedures with his local regulatory authority for the control and development of his maintenance program. (Note EASA: The operator should keep a record of short term extensions given for Fuel Airworthiness Limitations) This paragraph in the Fuel Airworthiness Limitation Item document is written to confirm to the local regulatory authority that exceptional short-term extensions of Fuel ALI intervals are permissible. Approval of such extensions rests with the local authority in the same way as it does for any other scheduled maintenance task interval extension.

# Service Bulletin Fokker F27

Jun 30/06 SBF27-28-070 Revision 3, Dec 11/14 Page 7

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. 

### C. Critical Design Configuration Control Limitations (CDCCL)

As applied to the Fuel Tank system safety policy, this term refers to a feature of any aircraft system which must be retained dur ing modification, change, repair or scheduled maintenance to ensure that an unsafe condition does not develop in the fuel system.

CRITICAL DESIGN CONFIGURATION CONTROL LIMITATIONS

CDCCL number Component(s) CDCCL Description Effectivity V endo r

(note 1) CDCCL-approved part numbers (note 1)
1.1 FQIS probes in wing main tanks It shall be ensured that only FQIS probes with a part number approved by the TCH under Fuel Tank Safety requirements for installation in the wing main tanks will be installed on the aircraft. All a/c Honeywell Inc Commercial Aviation FG250A4 FG220A77 FG220A88

1.2 FQIS probes in wing main tanks It shall be ensured that the approved component maintenance and repair procedures are adhered to during shop maintenance. All a/c Honeywell Inc Commercial Aviation FG250A4 FG220A77 FG220A88

2.1 FQIS probe / level sensor inboard tank It shall be ensured that only a FQIS probe / level sensor assembly with a part number approved by the TCH under Fuel Tank Safety requirements for installation in the inboard tank will be installed on the aircraft. A/c with inboard tanks Flight Refuelling (Eaton Aerospace Ltd) 9201000-198 9201000-199 9201000-200 9201000-201 9201000-206

2.2 FQIS probe / level sensor inboard tank It shall be ensured that the approved component maintenance and repair procedures are adhered to during shop maintenance. A/c with inboard tanks Flight Refuelling (Eaton Aerospace Ltd) 9201000-198 9201000-199 9201000-200 9201000-201 9201000-206
3 FQIS wiring outside fuel tanks It shall be ensured that repairs of wiring near to any FQIS wiring external to the fuel tanks will not increase the risk of a hot short of FQIS wires. All a/c N.A. N.A.

4 Bonding of collector tanks and of fuel lines, ventilation lines and components, wing main tanks It shall be ensured that the configuration and quality of the bonding provisions of fuel lines, ventilation lines and components inside or connected to the wing main tanks and the bonding provisions of the collector tanks are conforming to the design (ref. NC 4.610/xxx). All a/c N.A. N.A.

# Service Bulletin Fokker F27

SBF27-28-070 Jun 30/06 Page 8 Revision 3, Dec 11/14

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. 

### CRITICAL DESIGN CONFIGURATION CONTROL LIMITATIONS

CDCCL number Component(s) CDCCL Description Effectivity V endo r

(note 1) CDCCL-approved part numbers (note 1)
5 Bonding of fuel lines, ventilation lines and components, inboard tanks It shall be ensured that the configuration and quality of the bonding provisions of fuel lines, ventilation lines and components inside or connected to the inboard tanks are conforming to the design (ref. NC 4.610/xxx). A/c with inboard tanks N.A. N.A.

6.1 Anti-spray cover of main tank fueling shut-off valve It shall be ensured that an antispray cover is properly installed over the discharge port of the fueling shut-off valve of each main wing tank, conform the design. A/c post SBF27-28-071 N.A. N.A.

6.2 Anti-spray cover of main tank fueling shut-off valve It shall be ensured that only an antispray cover with a part number approved by the TCH under Fuel Tank Safety requirements will be installed on the aircraft. A/c post SBF27-28-071 Fokker Services Refer to SBF27-28-071

7.1 Collector Tank Level float switch It shall be ensured that only a collector tank le vel float switch assembly with a part number approved by the TCH under Fuel Tank Safety requirements will be installed on the aircraft. A/c with inboard tanks Eaton Aerospace Ltd 3515000-127 3515000-135

7.2 Collector Tank Level float switch It shall be ensured that the approved component maintenance and repair procedures are adhered to during shop maintenance. A/c with inboard tanks Eaton Aerospace Ltd 3515000-127 3515000-135

8.1 Level control pilot valve It shall be ensured that only a level control pilot valve with a part number approved by the TCH under Fuel Tank Safety requirements will be installed on the aircraft. All a/c Parker Hannifin Corporation F62B0050, F62B0050M1, F62B0050M2, F62B0050M3

8.2 Level control pilot valve It shall be ensured that the approved component maintenance and repair procedures are adhered to during shop maintenance. All a/c Parker Hannifin Corporation F62B0050, F62B0050M1, F62B0050M2, F62B0050M3
8.3 Fuse in wiring of LCPV solenoid It shall be ensured that the overcurrent protection fuse (in-line junction with integral fuse) is properly installed in the power supply wire of each LCPV solenoid, close to the point where the wiring enters the tank, and is undamaged. A/c post SBF27-28-069 (note 2) Fokker Services DME-F07

8.4 Fuse in wiring of LCPV solenoid It shall be ensured that only a fuse junction with a part number approved by the TCH under Fuel Tank Safety requirements for the specific application will be installed in the power supply wire of the LCPV solenoid. A/c post SBF27-28-069 (note 2) Fokker Services DME-F07

# Service Bulletin Fokker F27

Jun 30/06 SBF27-28-070 Revision 3, Dec 11/14 Page 9

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. 

### CRITICAL DESIGN CONFIGURATION CONTROL LIMITATIONS

CDCCL number Component(s) CDCCL Description Effectivity V endo r

(note 1) CDCCL-approved part numbers (note 1)
9.1 Fuel Quantity Indicator wing main tank It shall be ensured that only a wing main tank Fuel Quantity Indicator with a part number approved by the TCH under Fuel Tank Safety requirements will be installed on the aircraft. All a/c Honeywell Inc Commercial Aviation JG130A76 JG130A77 JG130A94 JG130A97 JG130A98 JG130A100
9.2 Fuel Quantity Indicator wing main tank It shall be ensured that the approved component maintenance and repair procedures are adhered to during shop maintenance. All a/c Honeywell Inc Commercial Aviation JG130A76 JG130A77 JG130A94 JG130A97 JG130A98 JG130A100

10 Drain holes and drain paths of wing dry bay

zones It shall be ensured that the drain holes and drain paths of the dry bay zones adjacent to the wing tanks are open and unobstructed. All a/c N.A. N.A.

11.1 Flame trap inboard tank compartment drain line. It shall be ensured that a flame trap is properly installed in the inboard tank compartment drain line. A/c with inboard tanks N.A. N.A.

11.2 Flame trap/flame arrester inboard tank compartment drain line. It shall be ensured that only a flame trap or flame arrester with a part number approved by the TCH under Fuel Tank Safety requirements will be installed on the aircraft. A/c with inboard tanks Fokker Services

AMAL 8680-127-401 8680-127-407 8680-127-409 8680-127-411 8680-127-412188-26-15-45FA188-206-15-45SS 188-26-15-45SS316



### Notes:

1) Vendor and part number data is only provided where the CDCCL consists of control of part number(s) at the installation or of control of application of proper maintenance / repair procedures of the part.

2) Operators that have introduced changes to the manuals in accordance with the instructions in the original issue of MCNM-F27-025 (attached to the original issue of SBF27-28-069) must make additional changes to the manuals in accordance with the instructions in revision 1 of MCNM F27-025.

D. Abbreviations.

A/c Aircraft FQIS Fuel Quantity Indication System LCPV Level Control Pilot Valve NC Norm Constructie (Dutch) / Design Standard TCH Type Certificate Holder YR Year

# Service Bulletin Fokker F27

SBF27-28-070 Jun 30/06 Page 10 Revision 3, Dec 11/14

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. 

## Service Bulletin Reporting Quality Form

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) 

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b) Quality rating of the Planning Information 

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c) Quality rating of the Material Information 

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d) Quality rating of the Accomplishment Instructions 

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

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

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g) Timely delivery of the SB 

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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 Email : 

### technicalservices@fokker.com