EASA AD No.: 2011-0107 

EASA Form 110 Page 1/2 

EASA AIRWORTHINESS DIRECTIVE 

AD No.: 2011-0107 

Date: 07 June 2011 

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) : 

MBB-BK117 C-2 helicopters 

TCDS Number : EASA.R.010 

Foreign AD : Not applicable 

Supersedure : None 

ATA 52 Doors – Sliding Door Emergency Jettison System – Inspection 

Manufacturer(s): Eurocopter Deutschland GmbH 

Applicability: MBB-BK117 C-2 helicopters, all serial numbers, if equipped with jettisonable 

sliding doors. 

Reason: In early 2010, EASA received a report stating that, during the opening of a 

jettisonable sliding door on a MBB-BK117 C-2 helicopter, the door guides of 

the jettison mechanism released uncommanded, resulting in the door 

detaching from the fuselage. 

To respond to the incident, Eurocopter Deutschland (ECD) issued Alert 

Service Bulletin (ASB) MBB BK117 C-2-52A-007, describing a one-time 

inspection for correct installation of the door, particularly the door guides, and 

modifications to improve the measures that would prevent unintentional 

release of the emergency (sliding door) jettison system. At the time, this was 

not considered to be an unsafe condition that would warrant AD action and 

EASA issued Safety Information Bulletin (SIB) 2010-07 to recommend 

operators to accomplish the instructions of the ASB. 

After SIB 2010-07 was issued, EASA determined that this condition, if not 

detected and corrected, could result in cases of in-flight loss of the jettisonable 

door, possibly resulting in damage to, or loss of control of, the helicopter, or 

injury to persons on the ground. 

For the reasons described above, this AD requires repetitive inspections for 

correct installation of the jettisonable sliding door(s), door guides and release 

cables and, depending on findings, accomplishment of corrective actions. 

Effective Date: 21 June 2011 
EASA AD No.: 2011-0107 

EASA Form 110 Page 2/2 

Required Action(s) 

and Compliance 

Time(s): 

Required as indicated, unless accomplished previously: 

(1) Within 50 flight hours or 60 days, whichever occurs first after the effective 

date of the AD, and thereafter each time when installation of the door 

guides of a jettisonable door is accomplished, inspect the installation of 

the jettisonable sliding doors, the door guides and the release 

mechanism, in accordance with the instructions of ECD ASB MBB-BK117 

C-2-52A-015. 

(2) If, during any inspection as required by paragraph (1) of this AD, 

discrepancies as detailed in ECD ASB MBB-BK117 C-2-52A-015 are 

detected, before next flight, accomplish the applicable corrective actions 

in accordance with the instructions of ECD ASB MBB-BK117 C-2-52A015. 

Ref. Publications: ECD ASB MBB BK117 C-2-52A-015 dated 26 April 2011. 

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. The required actions and the risk allowance have granted the issuance of 

a Final AD with Request for Comments, postponing the public 

consultation process after publication. 

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

Directives, Safety Management & Research Section, Certification 

Directorate, EASA; E-mailADs@easa.europa.eu. 

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

this AD, please contact: 

Eurocopter Deutschland GmbH, Industriestrasse 4, 

86607 Donauwörth, Federal Republic of Germany 

Telephone: + 49 (0)151-1422 8976; Facsimile: + 49 (0)906-71 4111.