EASA AD No : 2008-0113 

EASA Form 110 Page 1/2 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2008-0113 

Date: 10 June 2008 

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with 

Regulation (EC) No 216/2008 on behalf of the European Community, 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 EC 1702/2003, Part 21A.3B. In accordance with EC 2042/2003 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 

[EC 2042/2003 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]. 

Type Approval Holder’s Name : 

Eurocopter Deutschland GmbH 

Type/Model designation(s) : 

EC135 and EC635 series helicopters and 

MBB-BK 117 C-2 helicopters 

TCDS Number : EASA R.009 and R.010 

Foreign AD : Not applicable 

Supersedure : None 

ATA 67 Rotors Flight Control – Cyclic-Stick Locking Device – Modification 

Manufacturer(s): Eurocopter Deutschland GmbH 

Applicability: 

- MBB-BK 117 C-2 helicopters, serial number (s/n) 9004 through 9230 

inclusive, and 

- EC135 and EC635 series helicopters, all models, s/n 0005 through 0699 

inclusive, except s/n 0028, 0076, 0093, 0098, 0099, 0102, 0104, 0106, 0108, 

0110, 0111, 0113, 0114, 0116, 0117 and 0119. 

Reason: 

There have been several cases reported where take-off was executed with a 

locked cyclic stick. A locked cyclic stick may lead to loss of control of the 

helicopter. In order to prevent any further occurrences of inadvertent take-off 

with a locked cyclic stick, Eurocopter Deutschland (ECD) has developed a 

modification of the cyclic stick cantilever. After modification, locking of the 

cyclic stick is no longer possible. The cyclic stick can only be centered in its 

neutral position. 

For the reasons described above, this EASA AD requires the modification of 

the cyclic stick locking/centering device and the amendment of the applicable 

Rotorcraft Flight Manual (FLM).

Effective Date: 24 June 2008 
EASA AD No : 2008-0113 

EASA Form 110 Page 2/2 

Required action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Not later than 31 July 2008, modify the cyclic stick locking/centering 

device by removing the slide and spring from the cyclic stick cantilever in 

accordance with the instructions of ECD Alert Service Bulletin (ASB) MBB 

BK 117C-2-67A-008 or ASB EC135-67A-015, as applicable to the 

helicopter type. 

(2) Concurrent with the modification as required by paragraph (1) of this AD, 

amend the FLM by inserting the following note: 

 

NOTE: Before starting the engines, the cyclic stick must be moved to its 

neutral position. By folding up the cantilever to the pin, it is possible to 

move the cyclic stick into its neutral position and to center it. A locking of 

the cyclic stick is no longer possible. 

This may be accomplished by inserting a copy of this AD into the FLM, or 

by FLM page(s) supplied by ECD. 

Ref. Publications: 

Eurocopter Deutschland GmbH ASB MBB BK117C-2-67A-008 and 

ASB EC135-67A-015, both dated 14 April 2008. 

The use of later approved revisions of these documents 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. This AD was posted on 23 May 2008 as PAD 08-062 for consultation until 

06 June 2008. The Comment Response Document can be found at 

http://ad.easa.europa.eu. 

3. Enquiries regarding this AD should be referred to the Airworthiness 

Directives, Safety Management & Research Section, Certification 

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

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

this AD, please contact: 

Eurocopter Deutschland GmbH, P.O. Box 80 11 40, 81663 München; 

Federal Republic of Germany; Telephone: + 49 (0) 151 14 22 89 76; 

Facsimile: + 49 (0) 906 71-4111