ASB No. EC155-25A114 

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Civil version(s): B, B1 

ALERT SERVICE BULLETIN 

SUBJECT: EQUIPMENT AND FURNISHINGS - Pilot and co-pilot seats 

Inspection of the rear beam of the seat 

 

 

Revision No. Date of issue 

Revision 0 2012-05-14 

Revision 1 2012-08-09 

Summary: 

The purpose of this ALERT SERVICE BULLETIN is to check that there are weld beads on the rear beam of the 

pilot and co-pilot seats. 

Reason for last Revision: 

The purpose of the last revision is to replace in the appendix EADS SOGERMA Inspection Service Bulletin 

No. 2510106-25-888 Revision 0 with EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 

Revision 1, which requires an additional check of all welds of the rear beam of the seats.

Compliance: 

Compliance with this ALERT SERVICE BULLETIN is mandatory. 

For the attention of
 

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1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters/installed equipment 

On helicopters equipped with pilot and co-pilot seats part number (MP/N) 2510106-03-00 

or 2510106-06-00 with serial number (S/N) between 720 (inclusive) and 1451 (inclusive) and on which 

compliance with EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 Revision 1 has not been 

ensured. 

1.A.2. Non-installed equipment 

On pilot and co-pilot seats part number (MP/N) 2510106-03-00 or 2510106-06-00 with S/N between 

720 (inclusive) and 1451 (inclusive) and on which compliance with EADS SOGERMA Inspection Service 

Bulletin No. 2510106-25-888 Revision 1 has not been ensured. 

1.B. ASSOCIATED REQUIREMENTS 

Not applicable. 

1.C. REASON 

Revision 0: 

During a maintenance inspection, it was found that a weld bead was missing on the rear beam of a seat. 

This non-conformity, if not detected and corrected, could lead to crew injury in case of helicopter hard 

landing. 

EADS SOGERMA requires that the pilot and co-pilot seats be inspected to make sure that there is a weld

bead on the rear beam of the seat. 

This inspection is necessary to make sure that the seats are serviceable and comply with the flight safety 

rules. 

Consequently, EUROCOPTER renders compliance with EADS SOGERMA Inspection Service Bulletin 

No. 2510106-25-888 mandatory, through this ALERT SERVICE BULLETIN Revision 0. 

This ALERT SERVICE BULLETIN Revision 0 will form the subject of an EASA Airworthiness Directive. 

Revision 1: 

During compliance with Revision 0 of this ALERT SERVICE BULLETIN, it was found that a weld bead was 

missing on another part of the rear beam. 

This non-conformity, if not detected and corrected, could lead to flight crew injury in case of helicopter hard 

landing. 

The purpose of the last revision is to replace in the appendix EADS SOGERMA Inspection Service Bulletin 

No. 2510106-25-888 Revision 0 with EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 

Revision 1, which requires an additional check of all welds of the rear beam of the seats. 

The purpose of Revision 1 of EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 is to add 

information to the operating procedure and to add photos showing new areas to be checked. 

Revision 1 affects compliance with Revision 0 of this ALERT SERVICE BULLETIN. 
 

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1.D. DESCRIPTION 

Compliance with this ALERT SERVICE BULLETIN Revision 1 consists in extending the check for the weld 

bead to the whole of the rear beam of the seat in accordance with EADS SOGERMA Inspection Service 

Bulletin No. 2510106-25-888 Revision 1. 

1.E. COMPLIANCE 

1.E.1. Compliance at the works 

Helicopters/installed equipment: 

Comply with paragraph 3. of this ALERT SERVICE BULLETIN before delivery. 

Non-installed equipment: 

Comply with paragraph 3.B. before delivery. 

1.E.2. Compliance in service 

The work on the helicopter is to be performed by the operator. 

Helicopters/installed equipment: 

- Comply with paragraph 3. of this ALERT SERVICE BULLETIN within 50 flying hours or 3 months, the first 

limit reached is applicable, following receipt of this ALERT SERVICE BULLETIN Revision 1, issued on the 

date indicated at the bottom of the page. 

- If a weld bead is missing, according to the location, replace the beam or the seat within 50 flying hours or 3 

months, the first limit reached is applicable, following receipt of this ALERT SERVICE BULLETIN 

Revision 1, issued on the date indicated at the bottom of the page. 

NOTE 

In order to have sufficient time to replace a seat if 

necessary, before reaching 50 flying hours or 3 months, 

EUROCOPTER recommends that you perform the check at

the first opportunity, in order to inform SOGERMA as quickly 

as possible of any non-compliance of the seat, if any.

 Non-installed equipment: 

Comply with paragraph 3.B. before installation on the helicopter, without exceeding 3 months following 

receipt of this ALERT SERVICE BULLETIN Revision 1, issued on the date indicated at the bottom of the 

page. 

If the weld bead is missing, the installation of this seat is prohibited. 
 

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1.F. APPROVAL 

 Approval of modifications: 

Not applicable. 

 Approval of this document: 

The technical information contained in this ALERT SERVICE BULLETIN Revision 0 was approved 

on May 11, 2012 under the authority of EASA Design Organization Approval No. 21J.056 for helicopters of 

civil versions subject to an Airworthiness Certificate. 

The technical information contained in this ALERT SERVICE BULLETIN Revision 1 was approved 

on August 09, 2012 under the authority of EASA Design Organization Approval No. 21J.056 for helicopters 

of civil versions subject to an Airworthiness Certificate. 

1.G. MANPOWER 

EUROCOPTER recommends that compliance with this ALERT SERVICE BULLETIN is ensured by 

personnel qualified as follows: 

Qualification: - 1 Mechanical Engineering Technician. 

The time for the operations is given for information purposes, for a standard configuration. 

Time for the operations: Approximately 10 minutes to perform the check in accordance with paragraph 1.G. 

of the appended EADS SOGERMA Inspection Service Bulletin 

No. 2510106-25-888 Revision 1. 

Approximately 1 hour to replace a seat. 

1.H. WEIGHT AND BALANCE 

Not applicable. 
 

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1.I. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD 

Not applicable. 

1.K. REFERENCES 

Refer to paragraph 1.J. of the appended EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 

Revision 1. 

1.L. DOCUMENTS AFFECTED 

Not applicable. 

1.M. INTERCHANGEABILITY OR MIXABILITY OF PARTS 

 Not applicable. 
 

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2. MATERIAL INFORMATION 

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT 

Refer to paragraph 2.A. of the appended EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 

Revision 1. 

2.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONENT 

Refer to paragraph 2.C. of the appended EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 

Revision 1. 

2.D. MATERIAL TO BE RETURNED 

Return the material to the following address: 

EADS SOGERMA 

Z.I. de l’arsenal 

BP.60109 

17303 ROCHEFORT CEDEX 

France 

Tel: +33 (0)5.46.82.84.84 

Fax: +33 (0)5.46.82.88.13 
 

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3. ACCOMPLISHMENT INSTRUCTIONS 

3.A. GENERAL 

Not applicable. 

3.B. OPERATIONAL PROCEDURE 

Comply with paragraph 3. of the appended EADS SOGERMA Inspection Service Bulletin 

No. 2510106-25-888 Revision 1. 

3.C. IDENTIFICATION 

Identification of this document: 

Record compliance with this ALERT SERVICE BULLETIN Revision 1 in the helicopter documents. 

Identification of modifications on the equipment: 

- If ALERT SERVICE BULLETIN Revision 0 was already applied, add “REV 1” at the end of 

“ISB 2510106-25-888 applied”. 

- If ALERT SERVICE BULLETIN Revision 0 was not applied, comply with paragraph C. IDENTIFICATION of 

appended EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 Revision 1. 

3.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

Not applicable. 

4. APPENDIX 

Appended EADS SOGERMA Inspection Service Bulletin No. 2510106-25-888 Revision 1 in English. 
 

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Appendix
 

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Appendix
 

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Appendix
 

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Appendix
 

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Appendix
 

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Appendix 
 

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Appendix 
 

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Appendix