# 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 fl oatation 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 float ation gear in order to prevent a possible deterioration.



### Compliance :

EUROCOPTER renders compliance with th is ALERT SERVICE BULLETIN mandatory. For the attention of

# ASB No. EC130-25A042

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### 1. PLANNING INFORMATION

1.A. EFFECTIVITY

1.A.1. Helicopters/installed equipment

Helicopters fitted with emergency floatati on 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 floatatio n gear, the maintenance technicians from the repair

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

Maintenance Manual.

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

of the RH float and several deteriorated areas on the LH an d 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 BULLE TIN 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 float ation gear installation and the

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

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

Compliance with this ALERT SERVICE BULLETI N 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 c onsists in modifying the LH and RH emergency

floatation gear assemblies as per paragraph 2 of t he 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 i ndicated 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 modi fication 073881 which was approved on March 14, 2011,

through Compliance Record Document (CRD) 073881.

Approval of this document :

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

on July 08, 2011 under the authority of EASA Design Organization Approv al No. 21J.056 fo r 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 Mechanica l 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 comp liance with this ALERT SERVICE BULLETIN.

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

- AMM: 25-67-00, 4-1: Removal / Inst allation - 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 it ems 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 modifica tion (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 refer enced in this ALERT SERVICE BULLETIN:

The products can be ordered separately from t he 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 instructio ns - 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 modifica tions 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 Bulle tin No. 25-69-58 attached as an appendix

(07 pages).

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