ASB No. EC120-25A026

Revision 0 2011-07-11 Approved under EASA DOA No. 21J.056. Page 1/17 

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 Civil version: B 

 

ALERT SERVICE BULLETIN 

SUBJECT: EQUIPMENT AND FURNISHINGS - Emergency floatation gear 

Protector installation on the rear bracket and the supply couplings 

Revision No. Date of issue 

Revision 0 2011-07-11 

Summary: 

During a maintenance operation on the RH emergency floatation gear, a deterioration of the floats has been 

found. Compliance with the AERAZUR equipment manufacturer Service Bulletin No. 25-69-87 consists in installing 

protectors on the LH and RH floats of the emergency floatation gear in order to prevent a possible deterioration. 

Compliance: 

EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. 

For the attention of 
 

 ASB No. EC120-25A026

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1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters/installed equipment 

Helicopters with a serial number below or equal to 1632 and fitted with emergency floatation gear P/N: 

- RH side (MP/N) 215675-0 or 215675-1 or 215675-2 

- LH side (MP/N) 215674-0 or 215674-1 or 215674-2 

NOTE 

Refer to the aircraft individual inspection log book to identify 

the actual configuration of the helicopter. 

1.A.2. Non-installed equipment 

Emergency flotation gear P/N: 

- RH side (MP/N) 215675-0 or 215675-1 or 215675-2 

- LH side (MP/N) 215674-0 or 215674-1 or 215674-2 

1.B. ASSOCIATED REQUIREMENTS 

The emergency floatation gears P/N: 

- RH side: (MP/N) 215675-0 or 215675-1 

- LH side: (MP/N) 215674-0 or 215674-1 

must previously be upgraded to (MP/N) 215675-2 and 215674-2 in accordance with paragraphs 2.A. or 2.B. 

of the appended AERAZUR equipment manufacturer Service Bulletin 25-69-87. 

1.C. REASON 

During complete overhaul of an emergency floatation gear, the maintenance technicians from the repair 

station were not able to inflate the RH float in accordance with the instructions given in the Component 

Maintenance Manual. 

The investigations conducted by the repair station have revealed the perforation of one of the compartments 

of the RH float and several deteriorated areas on the LH and RH floats due to interference with the blunt parts 

of the bars and the banjo unions. 

The perforation of at least one compartment of the LH or RH float may cause the helicopter to tumble during 

ditching and prevent the complete evacuation of the passengers and the flight crew. Consequently, 

EUROCOPTER has issued the ALERT SERVICE BULLETIN 05A011 which enabled to check the condition of 

the emergency floatation gear floats every 300 flying hours. This periodic check has been incorporated in the 

Maintenance Servicing Manual (MSM). 

In order to eliminate interference between the blunt parts of the emergency floatation gear installation and the 

fabric of the floats, EUROCOPTER renders compliance with the AERAZUR equipment manufacturer Service 

Bulletin 25-69-87 mandatory, in accordance with this ALERT SERVICE BULLETIN. 

Compliance with this ALERT SERVICE BULLETIN 25A026 supersedes the scheduled hour based check 

according to ALERT SERVICE BULLETIN 05A011. 

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

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1.D. DESCRIPTION 

Compliance with this ALERT SERVICE BULLETIN consists in modifying the LH and RH emergency 

floatation gear assemblies as per paragraph 2 of the AERAZUR equipment manufacturer Service Bulletin 

No. 25-69-87. 

Compliance with this ALERT SERVICE BULLETIN also upgrades all emergency floatation gear assemblies to 

the latest configuration. 

1.E. COMPLIANCE 

1.E.1. Compliance at the works 

Helicopters/installed equipment 

NOTE 1 

Modification approval form FAM No. A00733 is integrated in the new 

definition of the installation from helicopter serial number 1632. 

NOTE 2 

This serial number is given for information only, refer to the 

aircraft individual inspection record (RIC) to identify the actual 

configuration of the helicopter. 

Non-installed equipment 

Before delivery, comply with paragraph 3.B.2. of this ALERT SERVICE BULLETIN on the part numbers 

specified in paragraph 1.A.2. 

1.E.2. Compliance in service 

The operations on the helicopter are to be performed by the operator. 

The operations on non-installed equipment are to be performed by the operator or by the supplier according 

to the configuration of the emergency floatation gear assemblies. 

Helicopters/installed equipment

Comply with paragraph 3. (except for paragraph 3.B.2.) of this ALERT SERVICE BULLETIN within 300 

flying hours or at the latest within 18 months (the first limit reached is applicable) following receipt of this 

ALERT SERVICE BULLETIN, issued on the date indicated at the foot of the page. 

 Non-installed equipment

Comply with paragraph 3.B.2. before installation on the helicopter and according to the requirements, 

without exceeding 18 months following receipt of this ALERT SERVICE BULLETIN, issued on the date 

indicated at the foot of the page. 

1.F. APPROVAL 

 Approval of modifications 

The information or instructions relate to FAM No. A00733 which was approved on February 28, 2011. 
 

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 Approval of this document

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

on July 08, 2011 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 be ensured by 

personnel with the following qualification: 

Qualification: 1 Mechanical Engineering Technician. 

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

Time for the operations: Approximately 1 hour for a Mechanical Engineering Technician for the removalinstallation of the emergency floatation gear assembly. 

For compliance with the AERAZUR equipment manufacturer Service Bulletin 

No. 25-69-87, refer to paragraph 1.F of the latter. 

1.H. WEIGHT AND BALANCE 

After completion of the work, record the weight and moment values on the PMC. 

- Weight: + 0.36 kg 

- Moment: Negligible moment deviations.

1.I. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD 

Not applicable. 

1.K. REFERENCES 

The following documents are necessary for compliance with this ALERT SERVICE BULLETIN. 

- AMM: 25-67-00, 3-1: General instructions - Emergency floatation gear 

- AMM: 25-67-00, 4-1: Removal / Installation - Emergency floatation gear 

1.L. DOCUMENTS AFFECTED 

EUROCOPTER will incorporate FAM No. A00733 in the following document: 

- Illustrated Parts Catalog (IPC) 

The affected document will be updated as part of a future revision. 
 

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1.M. INTERCHANGEABILITY OR MIXABILITY OF PARTS 

 Interchangeability 

Equipment items pre modification and equipment items post modification are not interchangeable. 

 Mixability

Mixability of the emergency floatation gears pre modification: 

- RH side (MP/N) 215675-0 or 215675-1 or 215675-2 

- LH side (MP/N) 215674-0 or 215674-1 or 215674-2 

and 

emergency floatation gear assemblies post modification (MP/N) 215674-3 and 215675-3 is forbidden on the 

landing gear assembly between the RH side and the LH side. 
 

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2. MATERIAL INFORMATION 

2.A. MATERIAL: PRICE - AVAILABILITY - PROCUREMENT 

Refer to paragraph 1.G. of the appended AERAZUR equipment manufacturer Service Bulletin 

No. 25-69-87. 

2.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONENT 

 Kits or components to be ordered for one helicopter or one assembly: 

Refer to paragraph 1.G. of the appended AERAZUR equipment manufacturer Service Bulletin 

No. 25-69-87. 

 Former Key word Qty New 

P/N Item P/N Instruction 

 

LH emergency floatation gear A/R 215674-3 1 

215674-0 or 

215674-1 or 

215674-2 

/ 

 

RH emergency floatation gear A/R 215675-3 2 

215675-0 or 

215675-1 or 

215675-2 

/ 

 

 Products to be ordered separately: 

Refer to the Tasks and Work Cards referenced in this ALERT SERVICE BULLETIN: 

The products can be ordered separately from the INTERTURBINE AVIATION LOGISTICS company. 

Website: http://www.interturbine.com

Telephone: +49.41.91.809.300 

AOG: +49.41.91.809.444 

2.D. MATERIAL TO BE RETURNED 

Not applicable. 
 

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3. ACCOMPLISHMENT INSTRUCTIONS 

3.A. GENERAL 

Read and comply with the General instructions - Emergency floatation gear as per AMM 

Task 25-67-00, 3-1. 

3.B. OPERATIONAL PROCEDURE 

3.B.1. Operational procedure on installed equipment (Figure 1) 

Remove the LH emergency floatation gear assembly (a) and the RH emergency floatation gear assembly 

(b) as per AMM Task 25-67-00, 4-1. 

Refer to paragraph 2 of the appended AERAZUR equipment manufacturer Service Bulletin No. 25-69-87 in 

order to modify the emergency floatation gear assemblies. 

Install the LH emergency floatation gear assembly (1) and the RH emergency floatation gear assembly (2) 

as per: AMM Task 25-67-00, 4-1. 

3.B.2. Operational procedure on non-installed equipment

Refer to paragraph 2 of the appended AERAZUR equipment manufacturer Service Bulletin No. 25-69-87. 

3.C. IDENTIFICATION 

 Identification of this document: 

Record compliance with this document in the helicopter documents. 

 Identification of modifications on the equipment 

Refer to the paragraph Identification (page 8/8) of the appended AERAZUR equipment manufacturer 

Service Bulletin No. 25-69-87. 

3.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

Not applicable. 
 

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b

2 

a

1 

Figure 1: Emergency floatation gears 

A 

A
 

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4. APPENDIX 

AERAZUR equipment manufacturer Service Bulletin No. 25-69-87 attached as an appendix 

(08 pages). 
 

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