ASB No. EC130-25A042

Revision 0 2011-07-11 Approved under EASA DOA No. 21J.056. Page 1/16 

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 Civil version: B4 

 

ALERT SERVICE BULLETIN 

SUBJECT: EQUIPMENT AND FURNISHINGS - Emergency floatation gear 

Protector installation on the rear bracket and the supply couplings 

Corresponds to Modification 073881 

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. 25-69-58 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 
 

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1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters/installed equipment 

Helicopters fitted with emergency floatation gears, pre modification 073881, with P/N: 

- RH side (MP/N) 217228-0 

- LH side (MP/N) 217227-0 

NOTE 

Refer to the aircraft individual inspection log book (MOD 

record) to identify the actual configuration of the helicopter. 

1.A.2. Non-installed equipment 

Emergency floatation gears, pre modification 073881, with P/N: 

- RH side (MP/N) 217228-0 

- LH side (MP/N) 217227-0 

1.B. ASSOCIATED REQUIREMENTS 

Not applicable. 

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 05A008 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 25-69-58 mandatory, in accordance with this ALERT SERVICE BULLETIN. 

Compliance with this ALERT SERVICE BULLETIN 25A042 supersedes the scheduled hour based check 

according to ALERT SERVICE BULLETIN 05A008. 

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. 25-69-58. 

1.E. COMPLIANCE 

1.E.1. Compliance at the works 

Helicopters/installed equipment 

NOTE 1 

Modification 073881 is integrated in the new definition of the 

installation since July 01, 2010. 

NOTE 2 

This date is given for information only, refer to the aircraft 

individual inspection record (MOD 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. 

Helicopters/installed equipment

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

hours or no later than 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 modification 073881 which was approved on March 14, 2011, 

through Compliance Record Document (CRD) 073881. 

 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. 
 

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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 AERAZUR equipment manufacturer Service Bulletin 

No. 25-69-58, refer to paragraph 1.F of the AERAZUR equipment manufacturer 

Service Bulletin. 

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 update 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 emergency floatation gear assemblies’ pre modification (MP/N) 217227-0 and 217228-0 and 

emergency floatation gear assemblies post modification (MP/N) 217227-1 and 217228-1 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. 25-69-58. 

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. 25-69-58. 

 Former Key word Qty New 

P/N Item P/N Instruction 

 

LH emergency floatation gear A/R 217227-1 1 217227-0 / 

RH emergency floatation gear A/R 217228-1 2 217228-0 / 

 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. 25-69-58 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. 25-69-58. 

3.C. IDENTIFICATION 

 Identification of this document: 

Record compliance with this document in the helicopter documents. 

 Identification of modifications on the documentation

 Record the embodiment of modification 073881 in the helicopter documents. 

 Identification of modifications on the equipment 

Refer to the paragraph Identification (page 7/7) of the appended AERAZUR equipment manufacturer 

Service Bulletin No. 25-69-58. 

3.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

Not applicable. 
 

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a

1 

b

2

Figure 1: Emergency floatation gears 

A 

A
 

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4. APPENDIX 

AERAZUR equipment manufacturer Service Bulletin No. 25-69-58 attached as an appendix 

(07 pages). 
 

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