AIRBUS HELICOPTERS DEUTSCHLANDEC135/635

ID: 2017-0199
Issue date: 2017-10-11
Effective date: 2017-10-25  
Source: EASA
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Equipment & Furnishing – Outboard Load System – Inspection / Replacement

EASA AD No.: 2017-0199


Airworthiness Directive
AD No.: 2017-0199
Issued: 11 October 2017
Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation
(EC) 216/2008 on behalf of the European Union, its Member States and of the European third
countries that participate in the activities of EASA under Article 66 of that Regulation.

This AD is issued in accordance with Regulation (EU) 748/2012, Part 21.A.3B. In accordance with Regulation (EU) 1321/2014 Annex I, Part M.A.301, the
continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an aircraft to which
an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [Regulation (EU) 1321/2014 Annex I,
Part M.A.303] or agreed with the Authority of the State of Registry [Regulation (EC) 216/2008, Article 14(4) exemption].


Design Approval Holder’s Name: Type/Model designation(s):
AIRBUS HELICOPTERS DEUTSCHLAND GmbH EC135 and EC635 helicopters

Effective Date:
25 October 2017
TCDS Number(s): EASA.R.009
Foreign AD: Not applicable
Supersedure: None


ATA 25 – Equipment & Furnishing – Outboard Load System – Inspection /
Replacement


Manufacturer(s):

Airbus Helicopters Deutschland GmbH (AHD), formerly Eurocopter Deutschland GmbH (ECD),
Eurocopter España S.A.

Applicability:

EC135 P1, EC135 P2, EC135 P2+, EC135 P3, EC135 T1, EC135 T2, EC135 T2+, EC135 T3, EC635 P2+,
EC635 P3, EC635 T1, EC635 T2+ and EC635 T3 helicopters, all serial numbers (s/n).

Reason:

An occurrence was reported where the hook separated from the hoist cable. Investigation
determined that failure of the internal retaining ring of the hook, in combination with a permanent
compression set of the elastomeric energy absorber, caused the separation.

This condition, if not corrected, may lead to detachment of an external load or person from the
helicopter hoist, possibly resulting in personal injury, or injury to persons on the ground.

To address this potential unsafe condition, Airbus Helicopters (AH) issued Alert Service Bulletin
(ASB) EC135-85A-069 to provide inspection instructions.




TE.CAP.00110-006 © European Aviation Safety Agency. All rights reserved. ISO9001 Certified. Page 1 of 3
Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.
An agency of the European Union
EASA AD No.: 2017-0199

For the reasons described above, this AD requires repetitive inspections of the hook assembly and,
depending on findings, replacement of the elastomeric energy absorber. This AD also requires
replacement of the retaining ring.

This AD is considered to be an interim measure and further AD action may follow.

Required Action(s) and Compliance Time(s):

Required as indicated, unless accomplished previously:

Note 1: AH ASB EC135-85A-069 is hereafter referred to as “the ASB” in this AD.

Note 2: For the purpose of this AD, an “affected hoist” has part number (P/N) 44301-10-2,
P/N 44301-10-5, P/N 44301-10-6, P/N 44301-10-10, P/N 44301-10-11, P/N 44301-10-12, or
P/N 44301-10-13. An “affected hook assembly” has P/N 44301-420 or P/N 44301-423 and is
installed on an affected hoist.

Note 3: For the purpose of this AD, Group 1 helicopters have an affected hoist installed. Group 2
helicopters do not have affected hoist installed (see Note 2 of this AD).

Modification:
(1) For Group 1 helicopters: Within 3 months after the effective date of this AD, and, thereafter, at
intervals not exceeding 6 months, inspect each affected hook assembly and replace the
retaining ring in accordance with the instruction of the ASB.

Corrective Action:
(2) If, during any inspection as required by paragraph (1) of this AD, any permanent compression,
as identified in the ASB, is found on the elastomeric energy absorber, before next hoist
operation, replace that elastomeric energy absorber in accordance with the instruction of the
ASB.

Terminating Action:
(3) None.

Part Installation:
(4) For Group 1 and Group 2 helicopters: From the effective date of this AD, it is allowed to install
an affected hoist on a helicopter, provided that the hook assembly is new (see Note 4 of this
AD), or the retaining ring was replaced and the affected hook assembly passed an inspection in
accordance with the instruction of the ASB within 6 months before the installation. Following
installation, the affected hook assembly must be inspected as required by paragraph (1) of this
AD.

Note 4: For the purpose of this AD, a hook assembly is “new” if it has accumulated 6 month or less
since the date of manufacturing.

Ref. Publications:

AH ASB EC135-85A-069 original issue dated 02 August 2017.



TE.CAP.00110-006 © European Aviation Safety Agency. All rights reserved. ISO9001 Certified. Page 2 of 3
Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.
An agency of the European Union
EASA AD No.: 2017-0199

The use of later approved revisions of this document is acceptable for compliance with the
requirements of this AD.

Remarks:
1. If requested and appropriately substantiated, EASA can approve Alternative Methods of
Compliance for this AD.

2. Based on the required actions and the compliance time, EASA have decided to issue a Final AD
with Request for Comments, postponing the public consultation process until after publication.

3. Enquiries regarding this AD should be referred to the EASA Safety Information Section,
Certification Directorate. E-mail: ADs@easa.europa.eu.

4. For any question concerning the technical content of the requirements in this AD, please
contact: Airbus Helicopters Deutschland GmbH, Industriestrasse 4,
86609 Donauwörth, Federal Republic of Germany
Telephone: + 49 (0)151-1422 8976; Facsimile: + 49 (0)906-71 4111
Web portal: https://keycopter.airbushelicopters.com > Technical Requests Management
E-mail: customersupport.helicopters@airbus.com




TE.CAP.00110-006 © European Aviation Safety Agency. All rights reserved. ISO9001 Certified. Page 3 of 3
Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.
An agency of the European Union

This is a partial extract of the full document - please refer to the actual report for full information.
Sources as credited.