EASA AD No.: 2013-0182

TE.CAP.00110-003 © 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.: 2013-0182

Date: 12 August 2013

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 EU 748/2012, Part 21.A.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].

Design 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 67 Rotor Flight Controls – Lateral and Longitudinal Trim Actuator –

Inspection

Manufacturer(s): Eurocopter Deutschland GmbH (formerly Messerschmitt-Bölkow-Blohm GmbH, 

Eurocopter Hubschrauber GmbH), American Eurocopter LLC

Applicability: MBB-BK117 C-2, helicopters, all serial numbers, with at least one of the 

following Duplex Trim Actuator Part Numbers (P/N) installed:

Duplex Trim Actuator lateral P/N 418-00878-050 or P/N 418-00878-051, and/or 

Duplex Trim Actuator longitudinal P/N 418-00878-000 or P/N 418-00878-001.

Reason: Recent analysis has shown that, under unfavourable circumstances, a total loss 

of the attachment screw of the trim actuator output lever could lead to a 

restriction of the lateral or longitudinal control range. When the attachment 

screw is completely lost, the output lever is not secured anymore and can move 

in axial direction. 

This condition, if not detected, could cause the bolt, connecting the control rod 

to the output lever, to make contact with the actuator housing, possibly resulting 

in reduced control of the helicopter.

To address this potential unsafe condition, Eurocopter Deutschland (ECD) 

issued Alert Service Bulletin (ASB) MBB-BK117 C-2-67A-020 providing 

instructions for the inspection of the lateral and longitudinal trim actuator output 

levers.

For the reasons described above, this AD requires an initial torque check of the 

attachment screw of the trim actuator output lever and the application of a 

torque marking, as well as repetitive inspections thereafter.

This AD is considered as an interim solution, pending introduction of a 

terminating modification.
EASA AD No.: 2013-0182

TE.CAP.00110-003 © European Aviation Safety Agency. All rights reserved. 2/2

Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet.

Effective Date: 26 August 2013

Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Within 300 flight hours (FH) after the effective date of this AD, check the

affected lateral and longitudinal trim actuator output levers for correct 

attachment and apply a torque marking in accordance with the instructions 

of ECD ASB MBB-BK117 C-2-67A-20.

(2) Within 400 FH after the check as required by paragraph (1) of this AD and, 

thereafter, at intervals not to exceed 400 FH, inspect the lateral and 

longitudinal trim actuator output levers for correct attachment in accordance 

with the instructions of ECD ASB MBB-BK117 C-2-67A-20.

Note: A non-cumulative tolerance of 40 FH may be applied to the inspection 

interval specified in paragraph (2) of this AD.

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

attachment shows relative motion, before next flight, accomplish the 

applicable corrective action(s) in accordance with the instructions of ECD 

ASB MBB-BK117 C-2-67A-20.

(4) From the effective date of this AD, it is allowed to install on a helicopter 

any replacement part, provided it has passed the initial check and has 

been marked in accordance with the instructions of ECD ASB 

MBB-BK117 C-2-67A-20.

Ref. Publications: ECD ASB MBB-BK117 C-2-67A-20, original issue, dated 18 June 2013.

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. This AD was posted on 03 July 2013 as PAD 13-092 for consultation until

31 July 2013. No comments were received during the consultation period.

3. Enquiries regarding this AD should be referred to the Safety Information 

Section, Executive 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, 

Industriestrasse 4, 86607 Donauwörth, Germany, 

Telephone: + 49 (0)151 1422 8976, Fax: + 49 (0)906 71 4111.