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EUROCOPTER DIRECTION TECHNIQUE SUPPORT 13725 MARIGNANE CEDEX FRANCE 

### ALERT SERVICE BULLETIN EC 120 VERSION (S): B 

# ALERT SERVICE BULLETIN

SUBJECT: ROTOR FLIGHT CONTROL: Yaw Control Protection. 

# No. 67A005

LIST OF APPROVED REVISION No. 0 REVISIONS APPROVED

Not applicable Date: July 30, 2001



### Approved under DGAC DOA No. F.JA01 

# 67A005 Page 1/7 2001.08.01

### 1. Planning Information 1.A. Effectivity - Helicopter version(s). B (below serial No. 1279). - Component(s) affected: Cabin floor. - Spare parts: None. 

### 1.B. Associated Requirements None. 

### 1.C. Reason To prevent any object from sliding between the canopy and the cabin floor. This ALERT SERVICE BULLETIN: - is issued further to INFORMATION TELEX Sequence No. 00000007, - forms the subject of the 7th Airworthiness Directive for EC 120 helicopters. 

### 1.D. Description 

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Installation of a front protection and a side protection on the cabin floor. 

### I.E. Compliance EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. At the works: From S/N 1279 onwards. Retrofit action. By the operator At the latest by December 31, 2001. Spares. Not applicable. 

### ALERT SERVICE BULLETIN EC 120

Approved under DGAC DOA No. F.JA01 

# 67A005 Page 2/7 2001.08.01

### 1.F. Approval Approval is limited to civil version helicopters subject to an Airworthiness Directive. The information or instructions relate to Aircraft Modification Approval Form (FAM) No. A00486 which was approved on July 4, 2001 by the DGAC. The technical information contained in this ALERT SERVICE BULLETIN was approved on July 30, 2001 under the authority of DGAC Design Organisation Approval No F.JA01. 

### 1.G. Manpower Qualification: 1 fitter. Temps: approximately 2 hours 

### 1.H. Weight and Balance Weight: + 0.18 kg Moment: + 0.23 m.kg 

### 1.I. Effect on Electrical Loads None 

### 1.J. Software Modification Embodiment State None. 

### tK. References 

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Refer to: AIRCRAFT MAINTENANCE MANUAL (AMM): 21-10-00, 3-8 

### 1.L. Other Documents Concerned None. 

### 1.M. Interchangeability and Mixability of Parts Notaffected. 

### ALERT SERVICE BULLETIN EC 120

Approved under DGAC DOA No. F.JA01 

# 67A005 Page 3/7 2001.08.01

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### 2. Accomplishment Instructions 2.A. General Not applicable. 

### 2.B. Operational Procedure 2.B 1. Preliminary Steps: - Remove the wall-to-wall carpet from the cabin floor, if necesssary. - Before performing any work, protect the canopy glass pane to preclude any risk of scratching it. 2 B.2. Installation of Side (1) and Front (2) Protections:

2.B 3. Check 

### ALERT SERVICE BULLET1N EC 120

Figure 1, - Prior to fitting the self-gripping tapes of protections (1) and (2), clean the surfaces in question

as per Aircraft Maintenance Manual (AMM) 21-10-00, 3-8. - Offer up side protection (1) complete with its self-gripping tape in accordance with the position as shown

on Figure 1 and by ensuring a clearance of 2 to 7 mm between side protection (1) and the canopy. - Mark the location of the self-gripping tape of side protection (1) - Bond the self-gripping tape of side protection (1). - Offer up front protection (2) complete with its self-gripping tape in accordance with the position and

dimension as shown on Figure 1 and by ensuring a clearance of 2 to 7 mm between front protection (2) and the canopy. - Mark the location of the self-gripping tape of front protection (2). - Bond the self-gripping tape of front protection (2). - Fasten protections (1) and (2) to the self-gripping tapes - Check that the clearance between the canopy and protections (1) and (2) is 2 to 7 mm. - Check the good holding strength of protections (1) and (2). 2 B.4 Final Steps: - Install the cabin wall-to-wall carpet if it has been removed. 

### 2.C. Identification Record compliance with this ALERT SERVICE BULLETIN in the aircraft documents. 

### 2.D. Operating and Maintenance Instructions Operation• None Maintenance: None.

Approved 

### under DGAC DOA No. F.JA01 

# 67A005 Page 4/7 2001.08.01

### 3. Material Information None. 

### 3.A. Material. Cost. Availability For all information, contact the Customer Support Department. 

### 3.B. Information Concerning Industrial Support Néant. 

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### 3.C. Material Required For Each Aircraft, Engine/Components Item New Key Word Qty Former Instructions P/N P/N Disposition And Item 1 C252A3601101 SIDE PROTECTION 1 2 C252A3602101 FRONT PROTECTION 1 

### 3.1). Material Required For Each Spare Part Not applicable. 

### 3.E. Re
-

### Identified Parts None 

### 3.F. Tooling. Cost. Availability None 

### ALERT SERVICE BULLETIN EC 120

Approved under DGAC DOA No. F.JA01 

# 67A005 Page 5/7 2001.08.01

### 3.G. Procurement Conditions Order the required quantity: X... side protection(s) P/N C252A3601101 and X... front protection(s) P/N C252A3602101 as per paragraph 3.C. of this ALERT SERVICE BULLETIN from



### 4. 

### Appendix None. 

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EUROCOPTER Etablissement de Marignane Direction MAINTENANCE SUPPORT SMR 13725 MARIGNANE CEDEX (FRANCE)
For ALERT SERVICE BULLET1NS, order by. Telex: HEL1COP 410 969F Fax. +33 (0)4 42 85 99 96 

### NOTE 1:

NOTE 2 - IMPORTANT: 

### ALERT SERVICE BULLETIN EC 120

On the purchase order, please specify the mode of transport, the destination and the serial number of the aircraft to be modified.



### Approved under DGAC DOA No. F.JA01 

# 67A005 Page 6/7 2001.08.01

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### Figure 1 

### ALERT SERVICE BULLET1N EC 120

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### 2

Approved under DGAC DOA No. F.JA01 

# 67A005 Page 7/7 2001.08.01