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## EASA AIRWORTHINESS DIRECTIVE

AD No: 2006 – 0164

Date: 09 June 2006

No person may operate an aircraft to which an Airworthi ness Directive applies, except in accordance with the requirements of that Airworthiness Directive unless otherwi se agreed with the Authority of the State of Registry. 

### Type Approval Holder’s Name:

EUROCOPTER Type/Model designation(s):

AS 350 and AS 355.

TCDS Number: EASA.R.008 and DGAC F 168.

Foreign AD: None

Supersedure: DGAC F-2005-0 87, EASA approval No. 2005-4691



### ATA 25 Equipment/Furnishings – Untimely Firing of Squibs on GOODRICH Electric Hoists

Manufacturer(s): EUROCO PTER (Formerly AEROSPAT IALE, EUROCOPTER – FRANCE)

Applicability: Helicopters: - AS 350 B, BA, BB, B1, B2, B3 and D, - AS 355 E, F, F1, F2 and N,

Equipped with - GOODRICH electric hoists, PN 76370 -XXX, (all types of motors), and not modified per MOD 073318 (or per Eurocopter AS 350 Alert Service Bulletin (ASB) No. 25.00. 95 or Eurocopter AS 355 Alert Service Bulletin No. 25.00.85)

or, - GOODRICH electric hoists, PN 76370–XXX, not equipped with the AUXILEC motor.

Note : This Airworthiness Directive (AD) is intended for maintenance personnel and crews.

### 2/3 Reason: This AD is issued following the di scovery of a potential risk of untimely squib firing, resulting in the cable being cut.

This AD: - Replaces AD No. F-2005-087 cancelled by its revision 1. - Restricts the applicability after embodiment of MOD 073318 (elimination of the ground on the hoist squib wiring), in compliance with referenced ASB No. 25.00.95 for AS 350 helicopters and ASB No. 25.00.85 for AS 355 helicopters. - Renders mandatory the embodiment of modification 073318 which consists in disconnecting or eliminating a squib grounding wire, according to the helicopter versions.

Effective Date: 23 June 2006

Compliance: 1. The following measures were rendered mandatory as from May 30, 2005, the effective date of AD F-2005-087:

- Before the next hoisting operation, deactivate the squib, and affix the

required labels in the cockpit and in the cabin, near the hoist operator, in accordance with the in structions specified in paragraph 2.B. of referenced EUROCO PTER ASB No. 25.00.94 for AS 350 helicopters or EUROCOPTER ASB No. 25.00.84 for AS 355 helicopters. - After the squib has been deactivated, and before each subsequent

hoisting operation, comply with the operating instructions specified in paragraph 2.D. of referenced EUROCOPTER ASB No. 25.00.94 for AS 350 helicopters or EUROCOPTER ASB No. 25.00.84 for AS 355 helicopters. - Before installing a hoist, held as spares, on a aircraft, comply with

the instructions specified in paragraph 2.B. of referenced EUROCOPTER ASB No. 25.00.94 for AS 350 helicopters or EUROCOPTER ASB No. 25.00.84 for AS 355 helicopters.

2. The following measures are mandatory as from the effective date of this AD:

No later than within 30 days, eliminate the ground from the hoist squib wiring, in compliance with the instructions specified in paragraph 2.B. of referenced ASB No. 25.00.95 for AS 350 helicopters and of referenced ASB No. 25.00.85 for AS 355 helicopters.

Before installation on a helicopter, of an electric hoist held as spares, comply with the instructions specified in paragraph 2.B. of referenced ASB No. 25.00.95 for AS 350 helicopters and of referenced ASB No. 25.00.85 for AS 355 helicopters.

Ref. Publications: EUROCOPTER AS 350 Alert Service Bulletins No. 25.00.94 and No. 25.00.95.

### 3/3 EUROCOPTER AS 355 Alert Service Bulletins No. 25.00.84 and No. 25.00.85. or later approved revisions.

Remarks: 1. If requested and appropriately su bstantiated the responsible EASA manager for the related product has the authority to accept Alternative Method of Compliance (AMOCs) for this AD. 2. This AD was posted as PAD 06-085 for consultation on 05 April 2006 with a comment period until 19 April 2006. No comment was raised during consultation period. 3. Enquiries regarding this Airworthin ess Directive should be referred to Mr. M. Capaccio, Airworthiness Dire ctive 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 (STXI) - Aéroport de Marseille Provence 1 3725 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

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