EASA AD No.: 2015

- 0163

TE. CAP.00110

- 00 4 © European Aviation Safety Agency. All rights reserved. 1 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No

. : 2015
- 0163

Date: 06 August 2015

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 E U 748/2012 , Part 21

. A.3B. In accordance with 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 ope rate an aircraft to which an AD applies, except in accordance with the requirements of that AD , unless otherwise specified by the Agency [ EU 1321/2014 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216 / 2008 , Article 14 ( 4 ) exemption]. 

### Design Approval Holder’s Name : AIRBUS HELICOPTERS DEUTSCHLAND GmbH Type/Model designation(s) : MBB

- BK 117 helicopters

TCDS Number: EASA.R.010

F oreign AD: Not applicable
Supersedure: None



### ATA 52 Doors

– Jettison S ystem A dhesive S eal

– Rem ov al

Manufacturer(s): Airbus Helicopters Deutschland GmbH (AHD) (formerly Eurocopter Deutschland GmbH, Eurocopter Hubschrauber GmbH, M esserschmitt

- Bölkow

Blohm GmbH). Applicability: MBB

- BK 117 A

- 3, MBB

- BK 117 A

- 4, MBB

- BK 117 B

- 1, MBB

- BK 117 B

- 2 and MBB

- BK 117 C

- 1 helicopters , all serial numbers

. Reason: Following application of A l ert Service Bulletin ( ASB ) MBB BK117

- 20A

- 11 4, original issue , difficulties were reported to activate the jettisoning sliding doors

. T his malfunction was caused by the adhesive seal, installed in accordance with the ASB, that hamper ed the free movement of the inner handle. Subsequent investigation showed that the affected adhesive seal has mechanical and physical properties that do not meet the relevant certification requirements. This condition, if not detected and corre cted, could lead to a malfunction of the sliding door jettison ing mechanism , reduc ing or preventing the ability to evacuat e the helicopter in the event of an emergency , possibly resulting in injury to occupants. To address this potential unsafe condition, AHD revised ASB MBB BK117

- 20A

- 114 to amend the instructions and to remove the affected adhesive seals from service

. For the reasons described above, this AD requires the re moval of adhesive seals Part Number ( P/N ) 117

- 800201.01 from the interior and exterior door jettison ing system of the sliding door s, and prohibits any new installation of the adhesive seal.EASA AD No.: 2015

- 0163

TE. CAP.00110

- 00 4 © European Aviation Safety Agency. All rights reserved. 2 / 2 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. This AD is considered interim action and further AD action may follow.

Effective Date: 20 August 2015
Required A ction(s) and Compliance Time(s) : Required as indicated, unless accomplished previously: ( 1) Within 30 days after th e effective date of this AD , inspect the exterior and interior door jettison ing system of the left (LH) an d right (RH) sliding door to determine if adhesive seals P/N 117

- 800201.01 are installed. ( 2) If , during the inspection as required by paragraph (1) of this AD, any adhesive seal P/N 117

- 800201.01 is found installed, before next flight , remove it in accordance with the instructions of AHD ASB MBB

- BK117

- 20A

- 114 Rev.1. (3) From the effective date of this AD , d o not install on any sliding door jettisoning system an adhesive seal P/N 117

- 800201.01. NOTE: After removal of the seals as required by paragraph (2) of this AD, the applicable Rotorcraft Flight Manual (RFM) can be amended in accordance with the instructions of AHD ASB MBB

- BK117

- 20A

- 114 Rev.1

. Ref. Public ations: AHD ASB MBB

- BK117

- 20A

- 114 Rev ision 1 dated 30 July 2015. The u se of later approved revisions of th is 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 t he 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 A D should be referred to the Safety Information 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: Airbus Helicopters Deutschland GmbH, Industriestrasse 4, 8660 9 Donauwörth, Germany Telephone: + 49 (0)151 1422 8976; Facsimile: + 49 (0)906 71 4111