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EASA AIRWORTHINESS DIRECTIVE 

AD No: 2006- 0339 

Date: 09 November 2006

No person may operate an aircraft to which an Airworthiness Directive applies, except in accordance with the 

requirements of that Airworthiness Directive unless otherwise agreed with the Authority of the State of Registry.

Type Approval Holder’s Name: 

EUROCOPTER 

Type/Model designation(s): 

AS 332 L2 HELICOPTERS 

TCDS Number: EASA R.002 

Foreign AD: Not applicable. 

Supersedes: DGAC AD F-2005-178, EASA Approval No. 2005-6385. 

ATA 62 Main Rotor – Swashplate Bearing Attaching Screw Heads – Check 

Manufacturer(s): EUROCOPTER (Formerly EUROCOPTER – FRANCE). 

Effectivity: EUROCOPTER AS 332 L2 helicopters, equipped with main rotor mast 

assemblies, all part numbers, pre MOD 0743174. 

Reason: 

This Airworthiness Directive (AD) is issued following the discovery of a case of 

broken screw heads originating from the swashplate bearing attaching 

screws. In time, the failure of these screw heads could lead to the loss of the 

non-rotating swashplate / rotating swashplate coupling. 

The purpose of this AD is to take into account the conversion of 

EUROCOPTER Alert Telex No. 62.00.66 into an Alert Service Bulletin (ASB) 

with the same reference number and with no change to the technical content 

and to inform operators that embodiment of MOD 0743714 cancels the 

instructions given in this AD. 

This AD replaces DGAC AD No. F-2005-178 which replaced DGAC AD No. F2005-129, and introduces no additional requirement. 

Effective Date: 19 November 2006 

Compliance: 

The following measures are mandatory from October 27, 2005, the effective 

date of DGAC AD No. F-2005-178: 

 

1. Installed main rotor mast assembly having logged less than 750 flying 

hours since new or last overhaul: 
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At the latest at 770 flying hours, then at intervals not exceeding 25 flying 

hours, perform a visual or tactile check of the screw heads, in order to make 

sure that all the screw heads are in place, in compliance with the instructions 

specified in paragraph 2.B. of EUROCOPTER AS 332 ASB No. 62.00.66 

referenced below. 

2. Installed main rotor mast assembly having logged 750 flying hours or more 

since new or last overhaul: 

2.1. Installed main rotor mast assembly that was checked less than 5 flying 

hours ago in compliance with DGAC AD No. F-2005-129 issued on July 15, 

2005: 

 

- No later than within 25 flying hours, then at intervals not exceeding 25 flying 

hours, comply with the instructions specified in paragraph 2.B. of the ASB 

referenced below. 

2.2. Installed main rotor mast assembly that was checked more than 5 flying 

hours ago in compliance with DGAC AD No. F-2005-129 issued on July 15, 

2005: 

- No later than within 20 flying hours, then at intervals not exceeding 25 flying 

hours, comply with the instructions specified in paragraph 2.B. of the ASB 

referenced below. 

3. Non-installed main rotor mast assembly having logged more than 750 flying 

hours since new or last overhaul: 

 Before installation on a helicopter, comply with the instructions specified in 

paragraph 2.B. of the ASB referenced below. 

4. If one screw head or more than one screw head is missing after having 

complied with paragraph 2.B. of the ASB referenced below: 

4.1. Installed main rotor mast assembly: 

 Remove the main rotor mast assembly before the next flight. 

4.2. Non-installed main rotor mast assembly: 

 Do not install this main rotor mast assembly. 

Ref. 

Publications: 

EUROCOPTER AS 332 L2 Alert Service Bulletin No. 62.00.66 or any 

subsequent approved revision. 

Remarks:

1. If requested and appropriately substantiated, the responsible EASA 

manager for the related product has the authority to accept Alternative 

Methods of Compliance (AMOCs) for this AD. 

2. This AD was posted as PAD 06-229 for consultation on 28 September 

2006 with a comment period until 12 October 2006. No comments were 

received during the consultation period. 

3. Enquiries regarding this AD should be addressed to the AD Focal Point, 

Certification Directorate, EASA. E-mail: ADs@easa.europa.eu 

4. For any questions concerning the technical content of the requirements in 

this AD, please contact: EUROCOPTER (STDI) - Aéroport de Marseille 

Provence 13725 Marignane Cedex - France. Ph.: +33 (0) 4 42 85 97 97 - 

Fax: +33 (0) 4 42 85 99 66. 

E-mail: Directive.technical-support@eurocopter.com .