ASB No. EC225-56A002

Revision 0 2012-08-08 Page 1/8 

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 Civil version(s): LP 

 

ALERT SERVICE BULLETIN

SUBJECT: WINDOWS - Jettisonable windows 

 Check of jettisonable emergency exit window panels 

 

Revision No. Date of issue 

Revision 0 2012-08-08 

Summary: 

Make sure that there is no sealant at the extruded sections of jettisonable emergency exit window panels. 

Compliance: 

EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. 

For the attention of 
 

ASB No. EC225-56A002

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1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A1. Helicopters/installed equipment 

Helicopters delivered before July 20, 2012 and on which the window jettison test has never been performed. 

NOTE 

The window jettison test must be performed every 2 years 

(in accordance with the Maintenance Program (PRE)). 

1.A.2. Non-installed equipment 

Not applicable. 

1.B. ASSOCIATED REQUIREMENTS 

Not applicable. 

1.C. REASON 

When performing jettison tests (operation to be performed every 2 years in accordance with the Maintenance 

Program (PRE)), the technician encountered difficulties in jettisoning the window panel. The investigations 

have shown on several windows that there was sealant between the extrusion and the window. 

Sealant between the extrusion and the window can make it impossible to jettison the window panel when the 

need arises and can slow down the evacuation of passengers. 

Consequently, EUROCOPTER makes the check of jettisonable emergency exit windows mandatory. 

1.D. DESCRIPTION 

Compliance with this ALERT SERVICE BULLETIN consists in checking on each jettisonable window panel of 

the emergency exits that there is no sealant between the extrusion and the window. 
 

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1.E. COMPLIANCE 

1.E1. Compliance at the works 

Not applicable. 

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 110 flying hours or 6 months, (the first 

limit reached is applicable), following receipt of this ALERT SERVICE BULLETIN Revision 0, issued on the 

date indicated at the bottom of the page. 

 Non-installed equipment: 

Not applicable. 

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 August 08, 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 0 was approved 

on August 08, 2012 under the prerogatives of the recognition of design capability FRA21J-002-DGA for 

French Government helicopters. 

1.G. MANPOWER 

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

personnel with the following qualifications: 

Qualification: 1 Mechanical Engineering Technician (2 Mechanical Engineering Technicians if the window is 

to be removed). 

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

Time for the operations: approximately 5 minutes for 1 Mechanical Engineering Technician for the check of 

 one window, 

 approximately 1 hour for 2 Mechanical Engineering Technicians for the 

Removal/Installation of one window. 
 

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1.H. WEIGHT AND BALANCE 

Not applicable. 

1.I. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT RECORD 

Not applicable. 

1.K. REFERENCES 

The following documents are required for compliance with this ALERT SERVICE BULLETIN: 

MMA: 56-20-00-051: Cabin windows - Removal - Installation 

MTC: 20.04.01.102: Cleaning - Use of cleaning products on individual parts and on aircraft 

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 

Not applicable. 

2.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

2.C. MATERIAL REQUIRED FOR EACH HELICOPTER/COMPONENT 

 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 

Not applicable. 

3.B. OPERATIONAL PROCEDURE 

For each jettisonable window: 

- Lift the extrusion slightly using a flat tool (that does not cause scoring). 

- Make sure that there is no sealant (on the inside and outside of the window): 

. between the window and the extrusion, 

. between the extrusion and the structure. 

NOTE 1

Presence of a sealant bead on the extrusion parting lines, on 

the window panel pull-out seal parting lines and on the 

pull-out straps is normal (See Figure 1 below). 

Figure 1 

- Interpretation of the results: 

. If there is no sealant seal: (Photo 1, Figure 2): 

- leave as is. 

. If there is sealant or if in doubt: (Photo 2, Figure 2): 

- Remove the window as per MMA Task 56-20-00-051. 

NOTE 2

If sealant is found between the structure and the profile, it is 

necessary to remove the extrusion. 
 

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- Clean the extrusion and if necessary the window and/or structure as per MTC Work 

Card 20.04.01.102. 

- Make sure that the extrusion shows no damage: 

. if the extrusion shows no damage: 

- install the window with the extrusion removed previously as per MMA Task 56-20-00-051. 

. if the extrusion of the window shows damage: 

- discard the extrusion, 

- install the window as per MMA Task 56-20-00-051. 

3.C. IDENTIFICATION 

 Identification of this document: 

Record compliance with this document and the revision number in the helicopter documents 

3.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

Not applicable. 
 

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Photo 1 

Photo 2 

Figure 2 

Presence of 

sealant