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EASA AIRWORTHINESS DIRECTIVE 

AD No: 2006 – 0164 

Date: 09 June 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 350 and AS 355. 

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

Foreign AD: None 

Supersedure: DGAC F-2005-087, EASA approval No. 2005-4691 

ATA 25 Equipment/Furnishings – Untimely Firing of Squibs on 

GOODRICH Electric Hoists 

Manufacturer(s): EUROCOPTER (Formerly AEROSPATIALE, 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. 
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Reason: This AD is issued following the discovery 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 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. 

- 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. 
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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 substantiated 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 Airworthiness Directive should be referred to 

Mr. M. Capaccio, Airworthiness Directive 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 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 .