EASA AD No.: 2014-0063-E

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EASA EMERGENCY AIRWORTHINESS DIRECTIVE

AD No.: 2014-0063-E

Date: 12 March 2014

Note: This Emergency 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:

AGUSTAWESTLAND S.p.A.

Type/Model designation(s):

AB 412 helicopters

TCDS Number: ENAC Italy A 157

Foreign AD: Not applicable

Supersedure: None

ATA 25 Equipment / Furnishings – Utility Hydraulic System / Pressure Line 

Pump and Filter – Inspection / Replacement

Manufacturer(s): AgustaWestland S.p.A. (formerly Agusta S.p.A)

Applicability: AB 412 helicopters equipped with hydraulic external hoist part number (P/N)

BL10300-60.

Reason: During hoist operation of an AB 412 helicopter equipped with hydraulic external 

hoist P/N BL10300-60, failure of pressure line pump P/N 1-8072 Rev. A was 

reported.

Preliminary investigations revealed that unusual wear of an internal 

subcomponent generated metal particles which caused the pump to fail. The 

root cause of this wear is under investigation, but has not yet been determined.

This condition, if not detected and corrected, could lead to further occurrences 

of pump failure, possibly resulting in personal injury or hoisting accidents.

To address this unsafe condition, AgustaWestland issued Bollettino Tecnico 

(BT) 412-140 providing instructions for inspection of filter P/N 1-12028 installed 

on the pressure line of the utility hydraulic system.

For the reason described above, this AD requires repetitive inspections of the 

filter for presence of metal particles and, in case of findings, replacement of the 

pressure line pump.

Pending final investigation results, this AD is considered an interim action and 

further AD action may follow.

Effective Date: 14 March 2014
EASA AD No.: 2014-0063-E

TE.CAP.00111-003 © European Aviation Safety Agency. All rights reserved. 2/2

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Required Action(s) 

and Compliance

Time(s):

Required as indicated, unless accomplished previously:

(1) Within 10 flight hours (FH) after the effective date of this AD and, 

thereafter, at intervals not to exceed 25 FH, inspect the filter P/N 1-12028 

installed on the pressure line of the utility hydraulic system for presence of 

metal particles in accordance with the instructions of AgustaWestland BT 

412-140.

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

particles are found, before next flight, replace the pump P/N 1-8072 Rev. A 

installed on the pressure line of the utility hydraulic system with a 

serviceable part in accordance with the instructions of AgustaWestland 

BT 412-140.

(3) From the effective date of this AD, installation on a helicopter of a pressure 

line pump P/N 1-8072 Rev. A is allowed, provided that the filter P/N 

1-12028 is inspected in accordance with the requirements of paragraph 

(1) of this AD.

Note: The initial inspection as required by paragraph (1) of this AD is due 

within 10 FH following pump installation. 

Ref. Publications: AgustaWestland BT 412-140 original issue, dated 11 March 2014.

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 results of the safety assessment have indicated the need for 

immediate publication and notification, without the full public consultation 

process.

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:

AgustaWestland S.p.A, Customer Support & Services – Italy, 

Product Support Engineering Dpt., Via del Gregge, 100, 

21015 Lonate Pozzolo (VA) – ITALY 

Tel.: +39 0331 664905, Fax: +39 0331 664684. 

E-mail: absereng@agustawestland.com.